Having an art degree, I love seeing some of the crazy fun stuff people come up with.
Recently, I was introduced to this fun blog - www.spritestitch.com.
It's a blog that features custom made video game art - mostly well known classic characters like Mario, Donkey Kong, Pac Man, Space Invaders and some Final Fantasy. It's really neat though!
My favorites are the Donkey Kong shelves and the NES Controller Coffee table, both can be seen in the Amazing Custom Gaming Room.