It's a graphic novel by Alan Moore. The good guy characters are antiheroes and most of them have some major flaws. In the case of several of them, they're essentially washed-up vigilantes that come back to fight crime. With that said, the graphic novels is worth reading before you watch the movie.
What goes up, must come down. Forgot about Scott Pilgrim and Kick Ass, both excellent adaptations. Wanted pretty changed the whole story from the book, but it was still pretty good.
I didn't like Scott Pilgrim at all. I hated how much time they spent on the creation of Thanksgiving. I wish there was more of a battle between the turkeys and the Native Americans.