And I'm not sure where to start.
Luckily, my local library has an outstanding graphic novel collection, and there's a very good chance just about anything you can name will be available for me to read through it. So, people, give me suggestions.
I've read quite a bit of Spider-Man stuff, since he's by far my favorite character in the Marvel Universe, and I own the entire Ultimate Spider-Man collection up to The Dead of Spider-Man. I've also read a good chunk of his stuff from the black suit days. Oh, and I've read The Dark Pheonix Saga. Probably some stuff I'm forgetting too.