@Ghost The problem with Mutants & Masterminds is it is easily broken imho. To much is covered by Afflictions and certain Feats can just destroy the power scale (ie. Brick types taking all out attack feats that give them great chance to hit while reducing defense, which they don't really care about because their main defense is just soaking damage anyways).
M&M looks great at first blush but the holes are pretty easy to spot and abuse imho.
Not that familiar with MWP but I haven't enjoyed any of them since the FASERIP set of rules back in the 80's. The system for MSHRPG with the d12 through d4 system is pretty neat but the only book I saw of that was more focused on playing FC's and there wasn't any reasonable rules for OC's that I found.