[SoLiDUS]

I can't give you an honest list because I will forget some. I'll just
stick to thought provoking movies (and even then, I'm forgetting some):

Ghost in the Shell (amazing)
Cube
Pi
Last Night (canadian movie, very thought provoking)
Good Will Hunting
American Beauty
The Matrix (do I need to explain?)
Fight Club
Vanilla Sky (or its spanish counterpart)
A Clockwork Orange
Blade Runner (the last scene is very special)
The Truman show