Barring obvious answers (a place to live, clothes, my computer, etc), I guess I'd have to say... My gamecube. It's just such a beautiful, simple system with a lot of great games for it. Its on a cord so I get my beanbag chair to sit closer to the TV for it, and its just really relaxing. I get a lot of good writing done when I'm playing games I know by heart, too. (Yes, I contemplate plot devices while kicking Ganondorf's ass, don't judge)