When you accidently bend a bunch of pins on a CPU, that can give you an adrenaline rush... or maybe just heart failure, one of the two.
I used to have a ton of hobbies: Model rocketry, RC cars, toy airplanes, model railroads, models in general, stamp collecting, coin collecting, electronics, misc. science experiments, blowing stuff up and setting things on fire, and then Quake came along...
Now it's mostly LAN parties, game development, and shooting stuff (real guns, airsoft, and paintball). Occasionally I'll watch some Anime, too, but I'm not as big into it as some of my friends. I guess you could put me under the building computers hobby as well, but I typically see that as more of a means to an end and only do it once every few years anyway.