I own a gaming PC and an Xbox 360 - they both get used as much as each other.
I see no reason for having to pick a side. I enjoy both platforms for different reasons, and buy different games (some games a better on the TV with a controller).
Am I the only one who only sees minor graphical differences between PC and console? Battlefield 3 was about the biggest difference I've seen, which was alright, but no enough to make me rant about how much more amazing it looks.
I also discovered that the PC has just as many idiots as console, so the "mature fan base" argument is also false.
It's just down to preference, really.