Maguire's leisure suit Guy Gardner was an awesome look, I think. They should have kept it. Guy in the GL corps, everyone around him in spandex, he's dressed in 1970s disco club attire. Give him a tie with a little GL logo on it, he'd be all set.
I don't consider Spider-Man's new costume to be a mistake... characters can get a little stale if they stay the same for too long.... I think it's good that Marvel has the guts to try something newHow long did that blue Superman phase last?
I hated Spider-Man's new costume to begin with, and I'm not a big Spider-Man fan, I enjoy the character but am not die hard about him. That said, the suit has grown on me. Seeing it in action and not just Quesada's still shots, it's not that bad.
I may be alone here, but I liked energy Superman. That said, I'm not a huge Superman fan, and much of my exposure to energy Supes was when I just recently went back and read Morrison's JLA. Had they just created a new character with that power set, I think it would have done well, they made the mistake in changing an existing one. For me, I'm not that attached to him and thought the change was kind of neat.