mine is when i land all of my hooks as support thresh and super feed my adc http://img2.wikia.nocookie.net/__cb20111212182504/leagueoflegends/images/thumb/3/38/Zhaotic_14-me-gusta-22vmrft.png/465px-Zhaotic_14-me-gusta-22vmrft.png
I love to kill an annoying BISH WHO PISSES ME OFF
then laugh in the chat
When my tank/assassin dives in, I ult'd him/her and knocks up EVERY ENEMY CHAMPION.....
Yes.... yeeeees.
(perspective from a Lulu support main)
Getting that Akali on mid-lane fed with my CC, then sit back and watch as my work spreads chaos and destruction over the whole battlefield as Akali wrecks like Akali does.
... When you put it like that, it sounds really edgy. But hey, it's what you do when you main 
:D
Mine is playing as 
and getting those rare opportunities to snipe someone with her ult as a support. It makes me feel so pro! :D
Getting an instant triple kill or higher with a karthus ult.
Mine is when i have the opportunity to type ->/all REKT (outplayz) ->gr8 b8 m8 i r8 8/8 i appreci8 & congratul8, no h8 m8 (teammate fails hard) And when i ward the tribush over dat dragon wall ;p
I love it when I'm able to save an ally from almost dying, like when they walk away with that tiny sliver of health. Best feeling ever.
Landing all my skillshots. Love poking people down with skill shots.
