That's because you are firmly entrenched in Bryan Singer's bum.
I didn't even like the X-Men movies that much. First one had some amazing moments; the way it came on (with Magneto at the concentration camp) was utter brilliance. But then the movie starts getting meh. It's a good movie, but as an X-Men freak it disappointed me. X-Men 2 came on cool, but sucked in the end. The whole Phoenix thing pissed me off. If you're going to do the Phoenix saga, at least TRY to do it right dammit.
Usual Suspects is one of the most awesome movies I've seen. I really like thriller movies, so it was right up my alley (or bum if you will). Other than that, I'm not familiar with any more of Singer's work.
Superman was a near perfect COMIC BOOK MOVIE. If you're going to complain about Luther's COMIC BOOK-ESQE plot, you might as well not even watch the damn movie.