I own 233 games on Steam. I mostly blame gifts and the holiday sales. I created my account on the 21st of December, no less. >.>
I played games on the PC when I was younger, but eventually gravitated towards consoles. I spent several years playing exclusively on 'em, but around the time I created my Steam account, I mostly moved over to the PC. I enjoy console and PC gaming equally, it's just that most of my friends only play on the PC. I will still play most multi-platform RPGs/singe-player on the console though, 'cause I prefer laying down in bed while playing.
Steam works well, it's easy, and allows me to play and talk with friends. A lot of people seem to have a problem with Steam and anything DRM, but I personally don't care or mind. I like teh Steam, mmhmm.