Well I'm pretty positive that there's already a topic on this exact same topic, but my favorite movie would have to be 300 because I just loved the raw action and cool storyline.
Original Star Wars Trilogy, Bill and Ted's Excellent Adventure, the Matrix 1 & 2, any of the Monty Python films, and of course... oh jeez... I totally forgot what I was about to say. Oh well. Not like anybody reads this anyway.