From the cine (talking to Harry about Dumbledore leaving over the holidays in the 6th)" "[...] tu see, he's traveling and he won't return until term . . . resumes." Harry: "Traveling? Where?" Snape: Walks away.
Haha, okay, so it wasn't exactly a quote, but still :p
From the libros (when talking to Sirius in OotP):"Or are tu afraid he might not take the consejos of a man who has been hiding inside his mother's house for six months very seriously?"
Or, I really like this one; "Oh, very good," interrupted Snape, his lip curling. "Yes, it is easy to see that nearly six years of magical education have not been wasted on you, Potter. 'Ghosts are transparant.'"
aaaaand another quote from the king of sarcasm -
"Fascinating though your social life undoubtedly is, Miss Granger, I must ask tu not to discuss it in my class. Ten points from Gryffindor."
The whole Potion speech in PS, book and movie alike.
CoS movie : "Perhaps it would be más prudent to first teach the students to block unfriendly spells... (little smirk to Lockhart) Professor."
PoA movie : "Vengeance is sweet !" and "Give me a reason. Give me a reason and I'll do it !"
GoF movie : "Perhaps, we should, for the time being... let them... unfold." and "Don't. Lie. To. Me !"
OotP movie : "Your father was a swine !" and "Get. Out."
HBP book : "Don't. Call. Me. A. Coward !" and "Oh, very good," interrupted Snape, his lip curling. "Yes, it is easy to see that nearly six years of magical education have not been wasted on you, Potter. 'Ghosts are transparent.'"
HBP movie : during the Unbreakable Vow : "Put it down, Bella. We mustn't touch what isn't ours." I felt all weird, his voice was dripping with possessiveness and I could not help thinking this was indeed a psychological trait of his. (I want to be his ! I want to be his !)
I realize I'm in amor with the way Alan dicho all these words. His voice... his pauses... his silences... it's incredible how much Alan can make his characters say a lot in pauses and silence. He has eloquent silences.