I kind of miss the part of the new champ select where you heard their quotes when they're being picked. That being said, what are your favorites? Mine would have to be 
: "Lady Luck is smilin'" I just love the way it's delivered.
"Call me king, call me demon, water forgets the names of the drowned."
Such an odd line when heard without context but so cool, really well delivered and incredibly sinister. It helps that Tahm's dialogue is some of the best in League by far.
ok 
It'seems not how much time you have, it'seems how you use it
Or
Everybody dies, some just need a little help.
Both black Champs have good champ select quotes XD
: "The Black Rose shall bloom once more."
Pretty much the only line LeBlanc has in reference to her secret organization. If she ever gets a new VO (and I really hope she will), then I'd love for her to talk more about it in-game, along with telling us more about who she is (or who she wants us to believe she is ;).
: "Violence solves everything."
"It's not about how much time you have...it's how you use it." 
That delivery is pure fucking perfection.
"Rules were made to be broken. Like buildings...or people!"
"Tactical decision, summoner!"
"Punch first! Ask questions while punching!" (Vi speaks to my play style :P)
Also 
, not so much for the words as the delivery. One voice sweet and angelic, and the other ready to go out and destroy people. It's glorious.
''Screaming won't do you any good, but it's music to my ears."
''Derp''
"I will protect you."
"What doesn't kill you just isn't finished yet..." 
"In carnage, I bloom, like a flower in the dawn."
http://pm1.narvii.com/6052/30057cabaa6618de1a3f49cbfab7d5d29e740b8a_hq.jpg When you deliver your line just right...
