I'm sure I've done this before, but its always fun.
1. Citizen Kane (Welles)
2. The Godfather (Coppala)
3. All Quiet on the Western Front (Milestone)
4. 2001:  A Space Odyssey (Kubrick)
5. Lawrence of Arabia (Lean)
6. Star Wars Trilogy (Lucas)
7. 8 1/2 (Fellini)
8. Pulp Fiction (Tarrantino)
9. Apocalypse Now (Coppala)
10. Singin' in the Rain' (Donen and Kelly)
11. Ordinary People (Redford)
12. The Shining (Kubrick)
13. To Live (Yimou)
14. Schindler's List (Speilberg)
15. La Dolce Vita (Fellini)
16. Casablanca (Curtiz)
17. All that Jazz (Fosse)
18. On the Waterfront (Kazan)
19. Dances WIth Wolves (Costner)
20. Ben-Hur (Wyler)
Sorry for all the many American films.  It has been a while since this list has been updated.  