What is a good/powerful, science fiction movie?

[Lemontree]

What is a good/powerful, science fiction movie?
I like powerful science fiction movies where the main character goes through changes as the story progresses to a final realization like spider man. Horror movies are good too

[Angellei]

If you really mean what you say, then Metropolis and Things To Come.

Tweeners and gen-x'ers not into the intellectual go for the lite-weight fare of the last ten years.