because of my large screen space, Im often running several windows with the desktop still showing in the background. Hence, using a small image is now my usual preference as quite simply your screen uses less power the more black you have on there... also, thanks to the sidelauncher gadget, all my icons are neatly squeezed onto a movable/hideable desktop item.. nothing more annoying than desktop clutter[/OCD]
Heres my current image, a Piet Mondrian composition, I had a greyscale jedi logo on there until recently. mmmm.......minimalism :p
http://i215.photobucket.com/albums/cc288/Astrotoy7/monWP.jpg)
mtfbwya