Your favorite quotes?

Aaah I have so many!!

"Oh, are you a prefect, Percy? You should have said something, we had no idea."
"Hang on I think I remember him saying something about it, once..."
"Or twice-"
"A minute-"
"All summer-"
- Fred and George: Philosopher's Stone.

Speaking quietly so that no one else would hear, Harry told the other two about Snape's sudden, sinister desire to be a Quidditch referee.
"Don't play," said Hermione at once.
"Say you're ill," said Ron.
"Pretend to break your leg," Hermione suggested.
"Really break your leg," said Ron.
- Philosopher's Stone.

Hermione, however, clapped a hand to her forehead. "Harry -- I think I've just understood something! I've got to go to the library!" And she sprinted away, up the stairs.
"What does she understand?" said Harry distractedly, still looking around, trying to tell where the voice had come from.
"Loads more than I do." said Ron, shaking his head.
"But why's she got to go to the library?"
"Because that's what Hermione does," said Ron, shrugging. "When in doubt, go to the library."
- Chamber of Secrets

As though an invisible hand were writing upon it, words appeared on the smooth surface of the map. "Mr. Moony presents his compliments to Professor Snape, and begs him to keep his abnormally large nose out of other people's business."
Snape froze. Harry stared, dumbstruck, at the message. But the map didn't stop there. More writing was appearing beneath the first.
"Mr. Prongs agrees with Mr. Moony, and would like to add that Professor Snape is an ugly git."
It would have been funny if the situation hadn't been so serious. And there was more...
"Mr. Padfoot would like to register his astoni

Oh! Mine would be from Severus Snape, in Philosopher's Stone:

" I don't expect you will really understand the beauty of the softly simmering cauldron with its shimmering fumes, the delicate power of liquids that creep through human veins, bewitching the mind, ensnaring the senses ... I can teach you how to bottle fame, brew glory, even stopper death "

I got a few, love the uncle billius one though;
"Did you like question ten, Moony?" asked Sirius as they emerged into the entrance hall.
"Loved it," said Lupin briskly. "'Give five signs that identify the werewolf.' Excellent question."
"D'you think you managed to get all the signs?" said James in tones of mock concern.
"Think I did," said Lupin seriously, as they joined the crowd thronging around the front doors eager to get out into the sunlit grounds. "One: He's sitting on my chair. Two: He's wearing my clothes. Three: His name's Remus Lupin..."

A week after Fred and George's departure, Harry witnessed Professor McGonagall walking right past Peeves, who was determinedly loosening a crystal chandelier, and could have sworn he heard her tell the poltergeist out of the corner of her mouth, "It unscrews the other way."

Lee Jordan was finding it difficult not to take sides.
"So-after that obvious and disgusting bit of cheating-"
"Jordan!" growled Professor McGonagall.
"I mean, after that open and revolting foul-"
"Jordan, I'm warning you-"
"All right, all right. Flint nearly kills the Gryffindor Seeker, which could happen to anyone, I'm sure..."

"Harry!" said Fred, elbowing Percy out of the way and bowing deeply. "Simply splendid to see you, old boy-"
"Marvelous," said George, pushing Fred aside and seizing Harry's hand in turn. "Absolutely spiffing." Percy scowled.
"That's enough, now," said Mrs. Weasley.
"Mum!" said Fred as though he'd only just spotted her and seized her hand too. "How really corking to see you-"

Mine would definetley have to be From Harry in OoTP
"You cant give a Dementor the Old One-Two!!" Harry says to Uncle Vernon after the Dementor attack on Harry and Dudley.

accio brain

"watching the news? again?" "well it changes everyday you see"