"Can somebody tell me what kind of a world we live in where a man dressed up like a bat gets all of my press?" - Jack Napier/Joker in Batman
And then, there's The Princess Bride, that has so many good lines, I don't know which ones to choose:
Vizzini: "You fell victim to one of the classic blunders. The most famous is: 'Never get involved in a land war in Asia.' But, only slightly less well known is this: 'Never go in against a Sicilian, when death is on the line!'"
Vizzini: "Inconceivable."
Inigo Montoya: "You keep using that word. I do not think it means what you think it means."
Inigo Montoya: "Who are you?"
Westley: "No one of consequence."
Inigo Montoya: "I must know."
Westley: "Get used to disappointment."
Inigo Montoya: "My name is Inigo Montoya. You killed my father. Prepare to die."
Inigo Montoya: "Are you the Miracle Max who worked for the king all those years?"
Miracle Max: "The King's stinking son fired me, and thank you so much for bringing up such a painful subject. While you're at it, why don't you give me a nice paper cut, and pour lemon juice on it?"
Inigo Montoya: "You seem a decent fellow, I hate to kill you. "
Westley: "You seem a decent fellow, I hate to die."