I don't even have a PS3 yet.
I don't know if I ever want one. There are maybe five games I'm really itching to play.
Unfortunately, aside from JRPGs and platformers, there really isn't anything I'd just assume play on a PC. And these days both of those are better served on hand-helds.
I'm not a huge gamer either. My PS3 mostly serves at my Blu-Ray player and Netflix machine, but it's nice to be able to play games if I feel like it.