My desktops have been the standard windows stonehenge background, an squirrel eating a bird, back to stonehenge, a labelled dragon skeleton, and now the background from the DDR song Sakura.
I have a password on my computer to log in and to get back on after hibernation. After I log in but before icons and such have loaded up, the dragon skeleton will show on my desktop. And, if I bring the computer out of hibernation, it'll show the dragon desktop before converting to the blue log-in screen.
I'm fairly certain I didn't still get stonehenge when I had the dragon, or evil squirrel with stonehenge... What the hell?