Keep in mind that I'm not talking about passives that are underpowered, or even passives that don't fit the rest of the champions kit. I'm talking about passives that just seem... uninspired.
Like Shyvanas armor buff. Why not just give her more base armor?
Xtremey48 votes
"you get to pay for an item!"
DrCyanide20 votesIt's at least a bit better since the re-work, but before it was absolutely horrible.
"Your passive is that you loose an inventory slot. That slot is filled with an item that can't be sold or exchanged. You can choose from three possible upgrades, but only one upgrade makes any sense."
junglerboy1611 votesThat item is also ridiculously cost efficient, slot efficient, and empowers his abilities. It gives a TON of free stats at max upgrade and allows him to have the highest AP of any champ other than Veigar (infinite scaling) and Cass (Built in multiplier).
Drunk Rummate48 votes
literally doesn't have a passive, it's just a tooltip explaining how his resource works lol.
Sightless669 votesGetting more of it when under half hp is a passive. With the bigger gains in teamfights now, it's actually pretty nice to have. I'd put it above Talon's.
Earthlord Jazz6 votes
"When Renekton is below 50% health, he generates 50% more fury from all sources"
SouL1ess26 votesTalon's passive still most useless passive NA
Tis a nice day8 votesOn a champion such as Ashe, Talon's passive would be pretty powerful. On a burst-based assassin, not so much.
Oleandervine21 votes[{quoted}](name=Tis a nice day,realm=NA,application-id=3ErqAdtq,discussion-id=IzYfJpZ6,comment-id=00080002,timestamp=2015-01-22T00:13:16.638+0000)
On a champion such as Ashe, Talon's passive would be pretty powerful. On a burst-based assassin, not so much.
The irony is that on Talon, Ashe's passive would be pretty powerful too.
7ha7guy7772 votesthis is probably why RNGesus insists that i always wind up having a Talon on my team when ARAM gives me Ashe
let me just AoE armor shred/perma slow so you can do tons of damage
Blade of Justic22 votes
/thread
TecToNiiC17 votesIt said useless passives, not champions that don't have a passive :^)
MasterPrankster19 votesLissandra's passive.
I hate it so much.
"Free spell every 18 seconds!"
Wtf does that have to do with ice, not to mention its useless after your first item.
Sightless6640 votes"Free spell every 18 seconds!" "Lowest mana regen in the game to compensate!"
Gotta love it.
Rikari11 votes1 
Ranged ADC with ability to gain even higher range, gets a close range explosion UPON DEATH. ** LIKE YOU FIGHT IN CLOSE RANGE LIKE 
WHO BARELY GETS CS OFF HIS PASSIVE.
**
2
Your Q can only hit once even though its 2 bolts. boosts AA damage by what 15?
3
"You get one critical strike if you haven't autoattacked in 34 seconds."
endless crits
THE GREAT SLOTH9 votesSurprised no one has mentioned 
yet. Not only is it pathetically underwhelming, it's pretty uninteresting as well. You basically forget it's there until you start accidentally stealing cs as support alistar. Unless you're playing jungle/top lane alistar that is, but that's not allowed. The only cs you're getting is the cs you accidentally steal, buddy!
junglerboy163 votesAP Bruiser Alistar is when his passive becomes monstrous. RoA>Rylai's>Liandry's turns you into an unstoppable super tanky AOE Burning ball of death. His passive proc rylai's and liandry's, and the AP from those three items makes the base hurt a lot too (around 60-70 base damage based on runes, and then burning for 4% current HP per second on top of that).
It is very underwhelming as a support, but the double damage to minions + a sunfire cape make you push like a god, and helps you transition into a late game split push tank.
killd0zer3 votesIt was originally designed to let him jungle, but now they don't want him to jungle and it's just kinda weak.
Cale0178 votesActually, Shyvana's passive is there to augment her dragon form so that she can tank while in it much easier than other champions could and still build some spare damage. It isn't the most inspired thing, but it does serve a purpose.
Honestly, the passive for me that's the most uninspired for the game is probably Zilean's. It makes no sense at all. He's a time bending mage, so all of a sudden his teammates are... learning more? Why? If you want to say that it's because they're "growing" at an accelerated rate, why aren't their other over time stats also increased? If Zilean's passive is making time pass more quickly for his teammates, shouldn't they also have more health/mana regen, or lower cooldowns? Higher movement speed? Time is passing quicker for them than those around them, right?
McAllister8 votesPassives that regain mana or grant free spells are generally weak, but Swain's is particularly bad and Veigar's takes the cake. Nunu needs to AA a lot to get free spells: this constrains support Nunu a great deal, makes jungle Nunu happy and is actually interesting on top Nunu. Lissandra has to hit spells to get more free spells. Kay. Swain has to last hit. You weren't doing that already? Veigar has to... spend mana. Really?
Solideus4 votesTo be fair, the more recent addition of an 
-effect to 
s passive is pretty intuitive given his Ult.
ModKnightsKemplar1 votesThe recent addition helped it a lot, but I still kinda feel like they could have just increased base mana regen and achieved the same effect. I wouldn't want them to disrupt his balance, though, because his kit feels complete and fair right now. I'm quite happy with it, even if I think it's a bit... "uninspired," was the word the OP used.
Solideus2 votesI think the "on champion kill"-part is at least marginally better, given that you have to participate or take action to acquire it. It allows you to participate longer when you are successful.
Edbwn4 votesDon't forget Xerath. His passive gives him a crap ton of mana if you let him auto attack you. Which you shouldn't, but still, ja feel
jpguy9025 votes Why would i want to die as the adc
Salt and Veigar5 votes
's passive is quite literally just a tooltip
TecToNiiC4 votesI was gonna say 
too but on the slightly trolly note that defensive stats dont hold up late game so it is effectively useless :^)
SpecterVonBaren4 votesCorki's. It adds nothing to his gameplay aside from maybe discouraging ap corki from being a thing.
EfficientDynamo4 votesAny of the post-death passives outside of Karthus, and maybe Sion. It just seems illogical to tie up part of your kit's power in a passive that only becomes relevant when you die, which in an ideal game doesn't happen often.
Serious hate for 
passive though. The delay for when it arms, delay to fire, and slow missile speed makes it so annoying to use. Very satisfying when it lands, but it isn't something you can ever really count on.
Downfall4 votes
The double crit passive
Hey we've got this wind based champion with a sword lets make his crit chance twice as high so hes incredibly hard to balance and can snowball insanely hard.
junglerboy163 votesAnything that is not Poppy's passive is by default weaker.
mi ramfan3 votesAshe's passive is 1 crit every 20 seconds if you stand around doing nothing the whole time.
Most useless one I can think of.
Rinky Dinky3 votesAshe
ShakySurgeon3 votes
Killing a Minion or Champion grants a /VERY/ insignificant Attack Speed Buff. His W should be his passive and grant Varus an ability that brings him back to being viable in the current Meta. Since Riot has been focusing on mobile champs, Varus can't really do too well, also his initial base damage is incredibly low.
I love Varus and still continue to main him regardless, but he's fallen so low down the tier of good ADC's. He also hasn't been touched in a LONG time update wise besides a REALLY insignificant mana regen buff that is pretty much unnoticeable.
the Anarchit3cht2 votesI don't know what you're talking about. I can't tell you how many towers I've downed and how much easier CSing is due to that AS speed boost. It also happens to be very significant when its a champion.
Laughing Fish2 votesI think 
's passive is a fail. It is just a useless version of 
's passive. 
alone is over 3x better while in combat, and a whopping 10x better when out of combat.
junglerboy1611 votesWrong, Mundo's passive is 0.3% of his max hp each second. It actually gives him 1.5% of his max health per 5, which is 50% stronger than Warmogs in combat.
Laughing Fish7 votesWell color me surprised. Your right.
Asdeft2 votes - Barely does anything if at all.
- Goes pretty un-noticed. Could be something better.
- Too slow :/
KnivingDude1 votes
's Chosen of the Storm. How exactly is being chosen by a storm giving you a passive that heals you.
Laughing Fish8 votesThe storm sent him on a mission to return the Ursine to their former glory, and kill 
. He is a blessed bear, and he was not destined to die yet.
KnivingDude1 votes[{quoted}](name=Laughing Fish,realm=NA,application-id=3ErqAdtq,discussion-id=IzYfJpZ6,comment-id=00020000,timestamp=2015-01-21T20:58:44.294+0000)
The storm sent him on a mission to return the Ursine to their former glory, and kill
So a Storm has healing properties. Gotcha.
Laughing Fish16 votesRead Volibear's lore. The storm does have healing properties.
KnivingDude5 votes[{quoted}](name=Laughing Fish,realm=NA,application-id=3ErqAdtq,discussion-id=IzYfJpZ6,comment-id=0002000000000000,timestamp=2015-01-21T21:54:33.392+0000)
Read Volibear's lore. The storm does have healing properties.
Thanks for letting me learn about the champ I like sincerely. Made me want to look up every champions lore now. I've always thought every lore was like Kalista's lore when I looked at Rammus' lore to confirm my suspicions. Then never again... until today. Thanks for the reminder.
aaronconlin7 votesPrepare for disappointment if you continue reading, because a lot of those stories are going to be un-canon soon.
Yulen Xoshxius2 votesAny chance you know why Volibear does not like Zilean?
KnivingDude3 votes[{quoted}](name=Yulen Xoshxius,realm=NA,application-id=3ErqAdtq,discussion-id=IzYfJpZ6,comment-id=00020000000000000001,timestamp=2015-01-21T22:22:01.953+0000)
Any chance you know why Volibear does not like Zilean?
Not sure Lore-wise, but I think it's because Since Volibear is preparing so hard for the future of his Ursine - and he didn't like how Zilean wants to solve his problems now just when bad things happened to him and his people. Like... You had the power of time and everything and you never really prepared for the worst case scenario?
The real reason I think because it had something to do with Riot Employees or something...
Sightless6612 votesWhen people were demanding an armored bear champion, Zileas said on the forums when asked that he would never let an armored bear into the League. So, when one did come out, they decided that Zilean would carry on the righteous hatred that Zileas started.
but I think that's just underwhelming, not really uninspired