That's hard to say, I know of way too many good movies to be able to really compare each and figure out which I like more than any other. If I'm going to narrow it down arbitrarily: Chinatown Blue Velvet The Maltese Falcon Robocop Double Indemnity The Good, The Bad, and The Ugly Once Upon a Time in America Taxi Driver Dr Strangelove Assault on Precinct 13 (the 1976 version, in case you're an asshole) Blade Runner Seven Samurai I could go on, but nobody reads these anyway so whatever.