See? Now that's what I like to see, Relique and WD, players in agreement and getting along. I know nothing about M&M, but it sounds like you both agree that M&M is great, whatever it is. (Mutants and Masterminds, presumably? I actually do have that book, Second Edition published by Green Ronin, but I've never played it.)
But back to the matter at hand -- why can't D&D people learn from that and just all get along? And, in my opinion, whether you prefer Pathfinder/3.5 or 4E doesn't really matter, does it? It's ALL Dungeons and Dragons.