There's really only one thing I don't like about those Mego-style figures: the lack of molded plastic gloves. I HUGELY dislike the stitched cuffs with like-colored plastic hands.
I'm 30 so I grew up with Super Powers and Secret Wars figures as my superhero toys of choice. The Mego Style does nothing for me even as simple nostalgia, but at the same time I enjoy the fact that they're around for those that do like them.