When I got into rpg's, superheroes were every bit as important to me as were fantasy characters! I've played quite a few systems.
DC Heroes by Mayfair had a really good system. I mainly stuck to playing the DC characters, but they did have rules for creating your own hero.
Marvel Superheroes was another one that I had, and played quite a bit. Now this one had a better character generation system so I did make a few characters. One in particular that I remember creating was Captain Blitz, a West German superhero (yes I created him during the mid-eighties). I still have the game but the box is no longer around.
Another one that I have some great memories of was Champions. I loved the idea of getting a certain number of points to build a hero. And you could take weaknesses to get additional points.
Heroes Unlimited was one that I played a couple of times. I like the Palladium system! There, I admit it, it's just fun and every game is completely compatible!
Then there was Villains & Vigilantes, which I never played. I'm increasingly intrigued by this game, and one of these days I'll buy it from Ebay or something. I always liked the artwork, and the modules were very original!
All of these games remind me of how much gaming I'm not doing right now!