"We go on that mission we all get killed. That's what they want, that's what they want! Those idiots in there, they're going to get chopped, every last one of them, they're not even due for hanging. You, you slob, you slob, what do you think you got coming?" --Victor Franko - The Dirty Dozen
Favorite line and most quoted line of dialogue from any movie around the family demesnes, usually just the last sentence, but often more than that.
"And it exploded!" --Teb, Galaxy Quest
I'm not sure what my absolute favorite line is for a more current movie, but this one's right up there. It's also the most quoted line from a modern film around here.