God, to think something from the 90's is old now. -sweats- I'm showing my age.
Anyway, for movies I've enjoyed that came out before I was born and that haven't been mentioned yet:
A Boy and His Dog (1975): weird post-apocalyptic story with some neat twists. And the dog talks~
the Man with No Name Trilogy (1964–1966): you know, A Fistful of Dollars, For a Few Dollars More, and The Good The Bad and The Ugly. Classics.
Roman Holiday (1953): another classic. All around charming. I enjoyed it more than I thought I would!
Fiddler on the Roof (1971): one of my favorite musicals and one of the best movie adaptations of a musical imo.
The Bad News Bears (1976): I'm a sucker for kid fights. Also enjoyed the comedy, like the kids are brats but not in the modern annoying way.
Road House (1989): heck of a good time, it's got silly moments and serious moments, but I was invested the whole while.
Glory (1989): one of my most favorite movies, if not the favorite. Love that period of history and I always get a swell of emotion for the characters.
Maurice (1987): another of my most favorite movies. Based on the book by E.M. Forster. Don't see many gay films from that time.
I may come up with more later, but these are the ones off the top of my head!