Discussion in the greatest movie tournament thread reminded me of this thread. I haven't updated my original list in a little while.

Quote Originally Posted by Iwritecode View Post
It's a Wonderful Life
Casablanca
Gone With the Wind
The Sound of Music
Citizen Kane
Jurassic Park
Any of the Alien movies
Any of the Predator movies
2001: A Space Odyssey
Reservoir Dogs
The Usual Suspects
Young Frankenstein
The Silence of the Lambs
The Godfather Trilogy
Goodfellas
Pulp Fiction
Blade Runner
The Big Lebowski
Most of the Harry Potter movies (I think I saw the first one)
I had Jurassic Park on my DVR for a few months but I think I eventually deleted it.

I watched the first half of Pulp Fiction.

There are probably a bunch more movies I could still add to this list.