Marvel Multiverse (D616)
I have the Core rulebook and was actually more impressed with the beta test book that came out than the Core book--I know that doesn't make sense on its face but I was really disappointed with the way many of the characters were done up and it seems to be either extremely easy or extremely difficult to kill in a game with little middle ground. I know heroes aren't supposed to kill, according to the rules, but the comics from Marvel these past several years have been more violent than ever and it seems like every mutant/hero is Omega level or knows 3+ Omegas that could come in and deus ex machina any adventure.
Storm used to have to concentrate just to create rain clouds to water her plants at Xavier's, now she can wreck entire countries with just a thought?! One bad week of PMS and there goes North America!
Still, dust is growing on my book and I'd rather put it to use than not. I'd be willing to play in a game with original characters, or maybe even try DM'ing if there's enough interest. If DM'ing is the way for me, I'd rather it not include existing heroes for a while and then gradually (if at all) introduce desired characters/groups if the game lasts long enough or builds enough interest.