I'm going to go watch this in two weeks and I'm pretty excited.
I think the problem with a lot of these superhero movies is that they're mostly generic trash, much like Transformers. As much as some would like to argue otherwise, they're the same shit with a different coat of paint made to appeal to comic book fans instead of a bunch of teenagers. Though that sometimes may be the same thing. Not that this is a bad thing always because occasionally you get the blockbuster movie done right like Avengers, but most of the rest is crap or just forgettable (Thor, Thor 2, Captain America, Iron Man 2/3, Incredible Hulk, Green Lantern, Amazing Spider-Man etc.) It's a long process to finally get to something done somewhat right.
The first X-Men is flawed and pretty bad, but the second is still one of the better superhero movies. That's mostly why I'm excited to see this after the strong initial reception it's receiving. I'm hoping it's not a let down.