The computer games industry goes into stagnation every now and then. The sheer amount of cloned titles of pacman, space invaders etc. is testament to the lack of originality you need in this business. I've seen some pretty unique titles in my time but you can stake your life on it that there will be a lot of similar games on the bandwagon as soon as it has been released. Doom 3 doesn't really look like it's predecessors but it looks uncannily like every other FPS that's around at the moment - the same with Quake 4.
I've long ago become bored with mindless shooters, they seem to have too much lineararity to them. Call of Duty looked impressive... until I realised the instructions you had to follow meant there cannot be much deviation from the path you had to take. On the other side of the coin you had Freelancer which allowed you to go anywhere, do anything and become whatever you chose to be (except a blond guy in brown leather
). This game was fantastic when I first came across it and many of my friends bought the game so we could multiplay and have fun.... but after a while I realised you were still restricted to that galaxy, those commodities etc.
So it doesn't really matter what genre of games you like, you WILL get bored with what's on offer at some point, but I've always noticed you get the kick back again when you find the right game.
This post is well too long already but I just have to disagree with games just being for kids. I was 8 when I started out with a ZX Spectrum 48k and I'm still here even though my social life is pretty good. I just think that adults have too much to deal with and cannot afford the time to sit around playing games.