Sci-Fi, to me, in a lot of ways like fantasy, but more restricted by reality. I'm a bigger fan of science fantasy or soft science fiction like Star Wars or Akira than I am hard science fiction like 2001 or Interstellar.
Btw, I only count *certain* superhero movies to be Sci-Fi, and I don't think any of the Batman movies count other than the Batman Beyond movies and I feel that the Superman movies fall more under fantasy than Sci-Fi. Also, stories based on true stories don't count since this is a science *fiction* list not a science NON-FICTION list, so no Apollo 13 (although I really like the movie).