Mega Man artstravaganza!
You may not be as much of an NES fiend as I am, but I love playing those old games. Among them, perhaps one of my most favorite is Mega Man 2. This unbelievable collection of Mega Man art spans years of classic Mega Man moments, and I love the sharpie art style.
If you like that (or not), you should definitely check out Desktop Gaming, which has totally amazing stuff like this picture above available for backgrounds. Too bad it doesn’t really have a good hosting solution.