New York Times listed 1000: http://www.nytimes.com/ref/movies/1000best.html
IMDB's 250: http://www.imdb.com/chart/top
Personally I like Citizen Kane, Lawrence of Arabia (even though I think Lawrence was a wacko), Chinatown, 2001 & 2010, Bladerunner, Silent Running, Terminator and T2, Raiders of the Lost ark, Indiana Jones and the Last Crusade, Alien, Aliens, Alien vs. Predator, Predator 2, The Wild Bunch, The Good, Bad, & Ugly, Once Upon A Time In The West, High Noon, Chinatown, The Two Jakes, About Schmidt, Vertigo, Rear Window, The Bridge on the River Kwai, Apocalypse Now, Saving Private Ryan, The Green Mile, IQ, Grumpy Old Men, Grumpier Old Men, Hopscotch, One Flew Over the Cuckoo's Nest, The Silence of the Lambs, Hannibal Rising, The Third Man, The Thin Man, Dr. Zhivago, Enemy At The Gate, Brazil, Heat, The Underworld movies, Shooter, The Italian Job (both first and the newer versions), Bourne Identity, Bourne Supremacy, The Usual Suspects, Heist, etc etc etc
IMDB's 250: http://www.imdb.com/chart/top
Personally I like Citizen Kane, Lawrence of Arabia (even though I think Lawrence was a wacko), Chinatown, 2001 & 2010, Bladerunner, Silent Running, Terminator and T2, Raiders of the Lost ark, Indiana Jones and the Last Crusade, Alien, Aliens, Alien vs. Predator, Predator 2, The Wild Bunch, The Good, Bad, & Ugly, Once Upon A Time In The West, High Noon, Chinatown, The Two Jakes, About Schmidt, Vertigo, Rear Window, The Bridge on the River Kwai, Apocalypse Now, Saving Private Ryan, The Green Mile, IQ, Grumpy Old Men, Grumpier Old Men, Hopscotch, One Flew Over the Cuckoo's Nest, The Silence of the Lambs, Hannibal Rising, The Third Man, The Thin Man, Dr. Zhivago, Enemy At The Gate, Brazil, Heat, The Underworld movies, Shooter, The Italian Job (both first and the newer versions), Bourne Identity, Bourne Supremacy, The Usual Suspects, Heist, etc etc etc