Pretty much what Luke said...its fun. I wanted to try something different with a computer, and I've had this idea for around a month or 2, though too lol.
I'm actually pretty busy, since I have a job/always out with my friends lol. Hence why I havent started this yet (besides already tearing apart the PS2's to see what I'd have to work with), and there's also the fact I'm waiting for a cheap slimline to pop up on ebay that I'm interested in .
I work 80+ hours a week, and I've had ideas floating around in my head for about 2 months for a new computer, and I've been getting ideas for my current rig lately. Bought a bunch of tools just haven't had time to do anything yet.