Which abilities feel the absolute worst to misuse?
Time for some catharsis through our mutual shame, friends. What champions do you fear using the most out of the horrible misplays you might possibly commit?
This question comes to mind after the last match I played with an allied Poppy who landed a perfect fully charged ultimate on an enemy Katarina...who landed smack dab on top of our low health Aatrox pushing further up the lane. Hilarity ensued...no, wait. Death. Death ensued. That's the word. I always confuse the two.
Anyway, I am absolutely terrified of playing Poppy's new kit because of how often I know I'm going to bungle her ultimate...and everything else in her high impact kit. Here is a short list further of champions who I have felt the most shame using:
Gods, do I feel stupid using Alistar sometimes. Not as much anymore since it's impossible to whiff his W->Q combo anymore, but one too many tragic headbutt enemy saves have occurred in the past. Compounding this is my fear of wasting his amazing ultimate by popping it at the wrong time. Yeah, good thing I saved that 70% damage reduction to cleanse that root when I'm at 10% health now after the enemy team has unloaded all of their burst on me!
This is only with one specific condition. I will under no circumstances ever pick Janna if there is a 
on my team. I'm...I'm sure a Malzahar player out there can help explain why.
Assume fetal position
CAW CAW CAW Oh, look. The enemy isn't actually bunching up inside the bush I thought I saw them hiding in 3 seconds ago. Ha ha. I hope they don't have a ward there to see my failure.
Heh heh heh, time to press R oh dang the teamfight suddenly moved 2 feet up the- CAW CAW CAW Guuuuuys, wait up! At least let me get a couple ticks of damage off!
Please. No. Fiddlesticks. Don't move right in front of the brush I was hiding in to channel your ultimate. (insert quickly truncated cawing)
I know some of you are at least as dumb as me. Let the pain all seep out, brethren. Reveal to me your secret shame.
(P.S. Does anyone know if Fiddlestick's terrify still works on minions? N-Not that I've ever done that)
Shielding in the wrong direction. First, it's so easy that there's just not a good excuse for messing up. Second, you completely fail at protecting your teammates when they need it. But even worse is the fact you can't cancel it, so it stays up the entire length of the spell, ensuring there is absolutely no chance your complete and utter failure goes unnoticed.
accidentally grabbing the enemy 
in a team fight.
Ult.
when you ult too early and they try to die but it times out and then they die 
ult. You see a five man team all bunched up together only to have them all step aside as you ult and you smack the turret behind them. Now you're behind enemy lines and your team can't help you as all five of the enemy burn at you. You're so tanky than it isn't a merciful fast death. It is a slow, miserable death that can lead you to waste a flash in the hopes of escaping.
Chaos Storm
Ult. Kill your teammates, or save the day. Or neither, just freeze Baron when he's hangin out by himself.
Ult - It feels terrible when you stop chasing (to prioritize a new target in a teamfight) because you feel certain about their path and just use your ult to finish, and miss.
Ult - It's almost instant and thus should be really easy to hit. So missing it (especially if you're e-flashing in the middle of 4 people and it turns out 3 of them are out of range...) feels awful. Worst was I was Quinn blinded once as I was mid jump-transform in, and I tried the ult blind as I expected to be in the middle of 4 people. Didn't hit a single one.
Ult - actually never missed this one (mostly because I've played like 1 or 2 games of Malphite), but I feel shame for my allies when they miss it because it's just so easy to hit. Meanwhile when I dodge it without flash, I feel a lot of pride.
W - WHY DOES THIS PRIORITIZE ALLIES AND MINIONS OVER MAX STACKS ENEMY CHAMPIONS? Like seriously, this is the most clunky ability in the game... It's probably single-handedly the reason why he's very strong in LCS and does terribly in solo queue (you can't tell your dashing allies to not dash on to the carry you're about to devour in solo queue...)
congrats you saved the squishy that would have been deleted by your Assassin.
TFW YOU ULT WRONG TARGET
pulling a Reggie-Red card when you're about to get ganked...
was the wrong guy to grab there 
to safety there 
.
e on minion instead of the adc.................
's entire kit...
... Wait...where'd you guys go D:
Annnnnnnnnd miss. No one saw that.
Totally wanted some minions.
Q
Now, you may be thinking,
"but zed's ult is OP! it'll always do a ton of damage"
's ult, when you break the distance tether and ult the nothing around yourself it makes me want to commit honorable count dooku (seppuku).
"oh yea 3 squishies at low hp, this will surely kill them"
Wish.
spellshielding 0,01 secs after the spell hits you
ult. It usually means death, the enemy gets away, or both.
Haha, you think you can dive me but the shield from my Q will ... cast times!!
Whistle while you clear no - no - no, don't use that tunnel!
E -> Q, too late so i dont drift
