I’m with Ned, I usually have other things as my desktop background. Usually cityscapes, landscapes, various images of the night sky and hubble space telescope images. Currently I’ve got a rolling slideshow of various 90′s video games painted up like modern HD remake versions by an artist called ‘Orioto’
http://orioto.deviantart.com/gallery/6943610
I’ve had these for a while now, should probably change them.