Movies you haven't seen, but know that you should

[Soul Daddy]

I just watched High Fidelity this weekend, a movie that I put off watching for years. This got me to thinking of others I realize I should see that I have dismissed for various reasons.

Schindler's List
American History X
Jaws
Casablanca
Citizen Kane
Memento
Any Monty Python movie - as made obvious in the jakesta thread.

And I'm sure there are a ton of others. Do you have any such list?