Since I was a child I've always gone with Spiderman and Hulk. Nothing else. I can still remember the early 80's wearing those spiderman and hulk "under-roos".
I like Spiderman mainly because he uses his intellect over strength to compensate for any shortcomings. There's a new game coming out w/ spiderman that's gonna be awesome. It's the FIRST one that actually has him fighting HIS style (ie. jumping acrobaticly from foe to foe).
More recently, I like seeing Captain America stuff because I'm a history buff and like reading about the political climate back then..
I only like superpowers which rules out batman and the punisher although if I was to dawn a cape, I'd most certainly torture everyone like the punisher did hands down.
Shit, I still have the comic when the Wolverine FIRST came out.. It was an incredible hulk issue waay back when. He was fighting the Wendigo, and the wolverine made an appearance.