The best part about this list is that I count 2 Pulp Fiction quotes, and 3 Samuel L. Jackson quotes (I may have missed some though)
For me, the winner is:
"Say what again! I dare you, I double dare you ************, say what one more goddamn time!"
But honorable mention goes to:
"I will cut your heart out with a spoon!"
"Now go away or I shall taunt you another time."
"I want him dead. I want his family dead. I want his house burned to the ground and I want to piss on the ashes."
Hmmm... Captcha: "Nivation coral," I swear that sounds like a ceramic glaze color...