I don't believe I can narrow all the great movies I've seen down just to 10 but its worth a shot.
1) The Godfather
2) The Good, The Bad, and the Ugly
3) The Departed
4) Psycho
5) Pulp Fiction
6) Seven Samurai
7) Citizen Kane
8) Fight Club
9) The Great Dictator
10) Children of Men
http://www.youtube.com/watch?v=F1gWECYYOSo
Please Watch/Share this video so it gets shown in Hollywood.