I agree about Star Wars. But I didn't much like Alien either, just a splatter movie.
Forbidden Planet was a good movie, and certainly better than Star Wars and 2001.

I have seen very few good SF or fantasy movies recently; they re-write everything and take away all the literary surprises. I hated the movie version of "The Lord of the Rings," not because of character changes, but every possible surprise was ruined; war scenes made no sense; Aragorn's and the Hobbits' offers of service were turned into kidnapping; etc. etc. (Sorry, I also felt that Sandkings as a movie did not have the pathos and sarcasm of the original story.)

Good movies (besides Forbidden Planet):
The Day the Earth Stood Still, Bladerunner, The Lathe of Heaven (original version, not the horrible re-make), and even Baron Munchausen for its vision, and Dragonslayer for its sarcasm.

My all time favorite? Two movies: both the Russian and English versions of Solaris, spectacular, disturbing, but more clear ending than 2001.