I love case mods. One of these days I’m going to try my hand at making my own, but until then I cheated and bought a pre-modded case. Still, I love seeing some of the things the folks with true modding abilities manage to pull off. Stuff like whats in an article titled Wired 11.10: Extreme Makeover.
My two favorites are the AMD Big Block (looks like a car engine) and the Pitfall Project (modded Atari 2600 case).