I'm a PS3 fanboy. Yay!
I have the 60gb PS3, I have 2 PS2's(one I let my brother use and the other I let my friend have, that friend will soon be a proud owner of a PS3), and I did own a PS1.
My brother bought a XBOX many years ago for the household, but he soon moved out and I played it but a few times.
This Gen I've convinced my brother and my best friend who both owned 360's to get PS3's. And I have no desire to buy a 360 myself.
It's not that I don't think it has any good games(though I am not a fan of the halo series, and i thought Left4Dead was shit, Gears was ok, haven't played much else) I just hate Microsoft's business model from a consumers stand point.
Also I have so many great childhood memories with the Playstation brand that I can't let go of it. Even though it may not be selling the most the PS3 has not let me down. Sony never has. And I'll always be loyal to a product that is always loyal to it's customers.
Sony is all there is.
The only non playstation games I have a desire to play are the Zelda series. Sadly I've never touched one before but for more than 30 minutes or so.