My favorite movie sword fight scene is between Westley (Carey Elwes) and Inigo Montoya (Mandy Patinkin) in the classic tale, The Princess Bride. The scene is perfectly executed; it doesn't matter that it's not realistic or that one can practically see the paint-strokes on the fake backgrounds.
Inigo: You seem a decent fellow. I hate to kill you.
Westley: You seem a decent fellow. I hate to die.
During the fight, Inigo soon realizes that Westley, too, is a great and learned master of the sword. They exchange ridiculous banter about the techniques and defenses they are using (which probably don't exist, but again its not important.) Each trick Inigo has up his sleeve is one-upped by the mysterious man in black. Finally, after Westley's theatrical vine-flip is much more ridiculous and impressive than Inigo's move, he has to inquire,
Inigo: Who are you?
Westley: No one of consequence.
Inigo: I must know.
Westley: (matter of factly) Get used to disappointment.
Inigo shrugs in acceptance, and continues.
Finally, when Westley has disarmed his opponent and brought him to his knees, Inigo solemnly asks to be killed quickly.
Westley: I would sooner destroy a stained glass window than an artist like yourself. But, since I can't have you following me either... clack!
He knocks Inigo over the head with the back of his sword and runs off to participate in funny scenes elsewhere.