Cruising
This caused a stink at the time for its alleged homophobia and seems to have fallen into obscurity, but whatever its politics it's a GREAT film. And while the Pacino v DeNiro debates will probably go on forever there can be no doubt that, with films like this, Pacino was far braver in his choice of roles.
Spider-Man 2
My favourite superhero movie. It's maybe seen as too lightweight by more hardcore comicbook fans but it gets everything just right for me.