I'm with you on this to a point...
I can't play fighting games anymore. I used to love them, but I can't go back to even the old favorites for more than 20-30 minutes.
Why? Fighting games, I think, are one of the few genres that have an inherently complex interface (ie. lots of moves/combos/button presses to memorize) - this hasn't changed in the last 15 years.
I have, though. I can't be bothered to remember each characters special moves. If the interface isn't completely obvious to me, I just give up; move on.
Look at most new games, though. Stuff that used to be simple (platformers, for example) now requires a tutorial level. How about a baseball game? There's so much stuff on-screen I don't know what to do anymore. All of this 3rd person squad-based shooting stuff? I won't even try.
I'm sure they're fun games and all... it's just that when I get home from my 9-to-5, I don't want to expend the mental energy to memorize a complicated set of controls.
And sure enough, when I go through my shelf of games from the last generation, basically everything there could be played with an NES controller. And if you ask me, that's how it should be.