I built mine in April 2012.

Intel Core i5 2500k @ 3.3Ghz
GeForce GTX 570
8GB RAM
1TB HDD
Windows 7 Ultimate

My only regret is not getting a SSD, but I was already over budget by the time I'd even thought about it. They're considerably cheaper now I guess but I don't want the ball ache of moving my OS over to it without royally mucking it up.

As for the kind of games, all sorts, and still on max settings which is nice. It would be easier to tell you what I don't play rather than what I do, which is essentially shooters. Everything else from Euro Truck Simulator to Elder Scrolls Online is fair game, I enjoy most genres.

I'm also quite happy to interchange between console and PC, I dislike elitism towards one or the other.