Movies you just have to see

I am hoping to create a list with all the movies people,or students, just "have to see". This list will include movies you have to see at least once, and movies you have to watch at least more.

This is an open list with all the movies that are a "must see". This list in open to input, as I do not know all the good movies out there. Let's just put on a limit on this, they have to be in English and non of them can be X rated or R rated. I am only talking about good-regular-unique movies so please don't spam the list.

The list (in no particular order):

1. Brazil (1985)
2. Dune (1984)
3. Die Hard (1988)
4. Back to the Future (1985)
5. Matrix (1999)
6. Gone with the wind (1939)
7. Grease (1978)
8. Rocky Horror Picture Show (1975)
9. Tron (1982)
10. Save the Last Dance (2001)
11. Lord of the Rings (2001)
12. Pirates of the Caribbean: The Curse of the Black Pearl (2003)
13. Willy Wonka & the Chocolate Factory (1971)
14. The Deep End of the Ocean (1999)
15. Spaceballs (1987)
16. Star Wars (1977)
17. The Shawshank Redemption (1994)
18. Top Gun (1986)
19. Beetle Juice (1988)
20. Toy Story 2 (1999)
21. Blade Runner (1982)
22. Ghost in the Shell (1995)
23. West Side Story (1961)
23. The Incredibles (2004)
24. Shrek 2 (2004)
24. Animatrix (2003)
25. Monsters Inc. (2001)
26. Total Recall (1990)
27. Schindler's List (1993)
28. Princes Bride (1987)
29. Reservoir Dogs (1992)
30. Pulp Fiction (1994)

A more extensive list I've found online (with similar taste I think...) is this one.