We have one of these running over in the Trek sub-forum, and since Star Wars is so infinitely quotable I thought maybe it would be nice to get one up and running over here too!
I'll start with a couple actually not from the movies, but rather from Part I of the Days of Fear arc of the KOTOR comics that I thought was hilarious:
Zayne: "Wait a minute, you stole that ship?
Gryph: "Me? Steal a ship? What kind of person do you think I am? I hired someone to steal a ship."
A few moments later, the ship's landed but the thief won't open the door...
Gryph: "It's me, the Gryph! Come on, Slyssk, open up!"
Gryph: "Umm... They say he's the best."
Gryph: "Well, he's the best on Ralltir."
Gryph: "At the moment."
Gryph: "It's a seller's market, Zayne, what do you want?"
Zayne: "I don't suppose there's a way we can get the ship without you?
Slyssk: "You can't bargain away a lifedebt to your Ghrakhowsk with a mere ship! While he breathes, my service is his! Where Gryph goes, I go!"
Gryph: "Figures. Well, cheap help is cheap help, I guess."