It's PC for me and i will say why. Price/quality index is much better talking about PC then laptop or Mac. I mostly only need pc in home, so for now it's enough. Mobile offers me as much as i might need if on a road or not in home.
But as time goes by, i now more and more feel the need of getting a laptop. But what i'm sure about is that it's not going to be Mac. I'm windows, and Win7 even encouraged me to become more Windows. That's a well investment into your OS usage. Mac and apple are in my opinion overrated only because of Jobs wise ad strategy. i tried to use Mac os, but i didn't liked it :/