here are a few I really liked
"Skin it, and barbecue the bastard." Yuki from Fruits Basket (talking about his older brother Ayame when he first shows up in the anime.)
"Why did I rescue this guy? He's anti-social and thinks he's some kind of evil kenival." Duo Maxwell from Gundam Wing
"Then I'll give you just one piece of advice......dying hurts like hell." Heero Yuy from Gundam Wing.
"Oh, man, Quatre loves to blame himself for everything if you let him. Sooner or later, he'll start saying that there's no air in space because he didn't work on it hard enough." Duo from Gundam Wing
"Just you wait and see, I will become the god of death once again! But right now........i need some sleep." Duo Maxwell Gundam Wing
"A cup of milk tea would be nice...with thirteen spoonfull of sugar." Abel Nightroad from Trinity Blood
there are more but I can't think of them............