I like Charlie Chaplin flicks and Woody Allen movies. They are my favourite films and basically the only ones I buy and collect.
But I also enjoy some SF movies. For instance, the three classics starring Charlton Heston: The Omega Man, Soylent Green and Planet Of The Apes. I hate the guy for being head of the NRA, but boy, those three movies rock. Even my girlfriend enjoys them.
All in all, though: gimme black and white flicks. I love black and white and grey tones. Eraserhead, Dr. Strangelove, Buster Keaton, Chaplin, some of Woody Allen's movies (Broadway Danny Rose, Manhattan, Shadow and Fog) ...
Aw, American Beauty is awesome ... Seen it like 20 times or so ...