I know I'm in the minority, but I love the batsh*t insanity that is Ang Lee's Hulk. I love the split screen comic book panel editing. I love Danny Elfman's score. I love the blissfully ret*d Hulked-out poodle. I love the dreams with the jellyfish on Mars. I love Nick Nolte's insanity, especially since he looks drunk as hell throughout the entire movie. I love the action sequences in the last third. It's creative and experimental and I can see why it doesn't work for some people, but it gets my pick.
Now, I do ADORE the X-Men trilogy as well, so that would come in second. The Incredibles is pretty much as good as it gets, I'm surprised it's not on there. Spider-Man 1-2 are great. Hellboy's grand.
And the rest I'm not terribly passionate about. Iron Man didn't really do it for me I'm afraid, but it was still pretty good. Just too much hyperbole in reviews left me disappointed, heh.