Batman Begins was really good. Dark Knight was better although it lost a lot of pace in the latter acts. The original Burton Batman is campy good. It's been too long since I've seen Spiderman 1 or 2 but I don't remember there being anything particularly bad about them. The Incredibles is amazing. I wasn't particularly impressed by Iron Man (I was watching on a distant plane TV and listening through crappy headphones though), I think mostly I was disappointed it didn't live up to the hype. Iron Man 2 was a bit too messy. Hellboy was quite fun. Blade is good fun, although I'm sure that's partly nostalgia (first 18 rated film I ever saw) but I can't really remember the sequels.
I can't really think of any other superhero films I've seen, but the only one that I'd say is as bad as Watchmen is probably Spiderman 3 and the other Schumacher(?) Batman films, although I've seen them so many times on tv I'm inclined to say they're not that bad.
I don't think I have high standards for films, I just have standards is all. When people say 'sure it wasn't a very good film but it's just a popcorn flick' etc. it baffles me. Why settle for a sub-par films just because Hollywood are too complacent to aim higher? Plus it really annoys me that the average person, who tends only to hear about the big-name 'blockbusters' are then blown away by any half-decent film that manages to sneak into the public conciousness amongst all the usual Hollywood crap. My friend, who doesn't watch a lot of films, called Inglourious Basterds 'the best film ever'. Now Basterds is a good film, I'd even go so far as to say the script is brilliant, Waltz's performance was superb and you can't go wrong with Brad Pitt. It is, however, far from being 'the best film ever', unless, of course, you are only used to seeing the usual shit Hollywood churns out.
Urgh, sorry to rant, I'm just in that kinda mood.