Ah, I didn't think it was amazing but because I'm not a film writer and director my opinion is wrong.
Nah, your opinion is yours, but I feel you'll find yourself in a minority with this one. It was awesomeness personified as far as I'm (and many people are) concerned. The best superhero film I've ever seen, quite frankly.
The balance of all the different characters coupled with the superbly directed action sequences are all it needs to get it to that level. Coupled with the the humour and, well, you've got something pretty special.
Oh and for a post-process 3D film, the 3D was very nicely done.