My all-time favorite (can't remember it word for word, but I'll get close):
Jack: I've killed three people since midnight, I haven't slept in the last 24 hours; I think you should be a little more afraid of me than you are right now!
And of course, from last season:
Jack (to Tony about his girlfriend): She's nice.
Sure that's out of context, but if you remember it... wow, funny.
From last night (paraphrasing)
You're gonna tell me what I want to know, question is how much you want it to hurt first.
Course, that guy offed himself in a matter of nano seconds.