I use a desktop cycler, and have almost a thousand different ones on rotation constantly. A lot of band wallpapers, all the pictures from Misanthropia.net (beautiful), "Art of Greg Martin", a lot of pictures taken by the Hubble, some Theodor Kittelsen and some random stuff. The best way to go, if you ask me.
Yea i like mine (obviously) and i think it's a bit reflective of my frame of mind. :/
Erik's set up makes me think of the Agalloch Grey EP, but instead it's Erik's Grey PC.