"(Helium Voice) Denizens of the Universe! Please Attend Carefully... DOWN HERE DAMN YOU!!!"
"He fell... down a hole... and there was fire... so he's dead now... Am I getting paid?"
"Oh, you little bastard."
"You Could F#(k Up A Siv!"
Can't remember the exact words but there's a great one where he defends Power Girl's Boob hole and saying that after Spider-Man One More Day, Red Hulk and All-Star Batman and Robin Boy Wonder that Power Girl was all he had left.
"You know, if there's a karma for robots, WALL-E will probably be reincarnated as a Dyson Sphere."
A quote from his father. "I'm not doing it for tomorrow. I'm doing it for today."
"The Batpod. So called because.......the Batpod pursues."
"Man, going into Afghanistan didn't take this long. Getting out of Afghanistan won't take this long!"
Every line from the bit where he speaks for Deckard during his fight with Pris.
There's more but those are some of my favorites. Though one I'm hopefully to see is for Chuck to give a Reasons You Suck Speech to Mako after his WTF moment towards the end of the Episode Night of a Thousands Stars. Without going into spoilers it is The moment when Mako not only lost most of his support from the fans but also from the writers given how Karma finally starts catching up to him.