I used to play PC games exclusively through high school and college. Afterwards, I bought a PS2 for one game: Shadow of the Colossus. I have since move completely to PS2/PS3 games. It's a much more relaxing way to play games. Pop in a disc, play a game on my couch with the TV and controller in hand. I've even moved over to playing FPSs with a gamepad and don't mind at all. The well done console games are programmed around controller. Plus all players are on an equal playing field.
Part of the reason for the switch, but by no means the biggest reason is that I work at a computer 90% of my day. The last thing I need to do when I go home is spend another hour or two at a desktop. Plus, I haven't bought new memory or a graphics card in years. Desktop still runs very well for web and productivity.