360 since launch.
Why just a 360? In all that time I've never been bored. I've had quality game after quality game and now coming into the holidays I just don't have enough time to fit them all in.
If I was to buy one today it would be a tougher choice. On paper with Blu-Ray and Wifi the PS3 looks good; but ultimately, as it should, it comes down to games.
As a rpg fan knowing Mass Effect was coming persuaded to me pick one up at launch and sell the PC. This one title was and still would be enough to make me pick the 360. The second must have title was Bioshock, I have always been just the biggest fan of System Shock 2 so it was another must have. Then add Blue Dragon, Lost Odyssey, Oblivion (out one year earlier) and Fable 2 to the mix and the choice is/was easy.
I'm not saying the PS3 doesn't have it's titles as if I'd have gone down that route I'd have picked many up. It's just that I feel there's no 'must have' games on the platform (for me yet). There's still no exclusive rpg and for all the hype R&C, HS and Uncharted just don't really get me that excited.