Having watched it again recently, both my younger brother and I thought Superman II theatrical version was good...but it has too many scenes that are out of place...like Zod and his crew using their super breath to blow things around all goofy like for several minutes. Donner cut is a lot better, even if it uses test footage for some scenes, and still has that second diner scene. I wish Donner had got gotten to finish making the movie the first go around.
Anyway, I normally don't like to rank things, but here's how I'd rank the Superman movies: Superman: The Movie, Man of Steel, Superman II Donner cut, Superman Returns, Superman II theatrical, Superman IV, Superman III.
I'm rewatching the Batman movies soon. I only watched the '66 one so far. I was rewatching all of the Marvel Cinematic Universe movies after the Superman ones, and just finished that the other day.