Mine include 
auto attacks, 
chomp, and everything 
.
I'd Like to hear what everyone else loves to hear during a match :D
https://67.media.tumblr.com/661a2d0491879af8a03402bccee55e49/tumblr_nkrg1s9gnf1raur77o1_500.gif
#"SKREEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE"
Ahri's death sound ( ͡° ͜ʖ ͡°)
Baron Back, hands down.
Also Kindred's autos. Utora kicked ass on those.
Not during the match, but mine is definitely the Play Button sound
: Boop.
Mordekaiser's ultimate.
I love his yell, the eerie laughter and the booming sound it makes.
His Third Q BONK comes close though.
The sound of a Talon ult ending, when the blades shoot together, and the chord that's played when Jhin ults.
Arcade and DJ 
sounds... <3
Jhin's Ult music. Nothing can top it for me.
Gangplanks ult in the distance...the sound of cannons pounding the earth making a fresh cemetery.
Personal favorites:
, 
, 
auto attacks - so satisfying, love farming with them
- in my opinion one of the few abilities in the game that truly deserves the "ultimate" title. when you hit that R key and get that big booming DAAARRRRKNNESSSSS you know everything is about to pop off
q...
Q...
Q!!!
That Violin playing whenever Jhin ults
's music that plays at the start of the game.
Blackfrost 
's Ult
His Q and W's SFX
's laugh when he ults
's Laugh
's W and Ult
's everything
his voice in general and ult
's voice in general as well
#Since i'm a Morgana main, obligatory Morgana sound pack:
######I entirely get off from hearing my opponents suffer and i don't care. [slayer-pantheon-popcorn]
Second place goes to squeaky sounds and balloon plop sounds - Pool Party skins, Fiora's W noodle sword squeak, her R balloon pop squeak, Surprise Party Foddle's Dark Wind balloon animal squeak on bounce. Can't forget that party whistle on his Fear tho.
Third place goes to Draven's Gladiator Recall sound of a crowd cheering for him in the arena and his passive sound. I don't play Draven but he's a pretty fun champion to watch be played.
The ult sound
https://www.youtube.com/watch?v=47D2cxIm-oE
DRAAAVEEEN.
's /taunt (the scream) always gave me shivers. It's not your usual "Haha, you suck."
More of a "You fucked up and now you're gonna die painfully."
Nunu bot's laugh. --cancer intensifies--
I love the sound of kogmaws throwing up because I know someone is raging trying to reach his squishy body before they die.
I really like the little whoosh noises on Runaan's Hurricane. 
Valor's old auto attacks + Skystrike... most satisfying audial feedback ever.
That announcer yelling "Pentakill" especially if I'm the one she's announcing for. Though not when it's for my opponent.
More seriously I enjoy listening to explosions especially Ziggs and Jhin.
all the music background in Jhin's VO and ult
2.5 attack speed on Bard. Hands down the funniest thing I have ever laid my eyes/ears upon.
Boop
the music that plays during his ult (and the music he has at the start of the game)
the sound of cannons firing in the distance
everything about this is ult is satisfying
the explosion from his ult
charging her ult
all the sounds of her ult (firing/travelling/exploding)
and the best:
laugh
