Hmmm, I got a few favourites from Miami:
(Blood Brothers, I think) Horatio: We never close (the best one linder eva!)
(Inside Out)
Kyle: I did what you said, I fought back.
Horatio: I know you did, son, I know you did.
K: Why are you doing this?
H:I'm doing this, Kyle, because I'm your father, okay.
K:Uh - what?!
H:I know you don't believe me, and we can't talk about it now, but we will. C'mon!
(Kill Zone)
Horatio: What do you get when a six foot shooter lays down with a three foot weapon?
Calleigh: Hot flashes, but that's just me.
(Down To The Wire)
That long talk with Eric and Calleigh in the locker room, preferably this part:
Cal: Well I have to say something... because I feel for you and you know that (surprized expression on Eric's face).
And there's lots more!