I liked Spiderman and loved Spiderman2.
I agree the X-Men movies can be bland if you are not into them but they were not really that bad and pulled off the storyline better than one would think. The Hulk failed because the director missed what the Hulk was - it is Mr. Hyde meets the nuclear age. The modern Hulk movie should have been Mr. Hyde meets the DNA age.
I was bored with The Hulk, possibly because they didn't use a real person.
Hulk went wrong, I think, because the director wasn't content to make a comic book movie out of a comic book, and tried to mix all kinds of pop psychology into it. I think he caught the Mr. Hyde angle perfectly well--I mean, it's pretty obvious--but his story was trying for some kind of Oedipal angle that was just dull.