I'm mostly a console gamer (apart from for strategy games) for a couple of reasons, firstly, as Saddam said, I'm not really a computer person and I'm not particularly inclined to spend a great deal of time and energy learning how to become one just for an entertainment system.
Secondly, I prefer games to be something I can share with people around me (Flatmates, partners, family, friends, parties) and you can't really do that with PC games. It's why the Gamecube was my favourite of the last-gen consoles - you could stick four controllers in and have a great time with Mario Kart, Smash Bros, FPSs, etc.
I don't want to play multiplayer with a swearing kid in America over headphones, I want to play multiplayer with my friends in the same room so that you can punch them in the arm when they use a cheaty blue shell for the fifth time in a race! I was honestly shocked that when Burnout: Paradise was released for Ps3 it had no split-screen multiplayer mode - surely that should be standard for racing games?
Unlike a lot of gamers who grew up playing them as a largely solitary experience, I always played games with my brother or my Dad or my friends. Even when it was a 1 player game, we'd help beat the game together and swap over the controller when one of us lost a life. Some of the biggest rows in my house came from gaming arguments (My Mom actually banned us from playing Worms for a while because of the domestic apocalypse it wrought.)