Mine is Russell Crowe and DH has a satellite view of Florida which is pretty cool (and he argues, much more tasteful than my Russell ). When I was working, I had a Magic Kingdom one on my work PC.
My work computer has Mickey on a black background - sounds like the one someone mentioned earlier from disneyexperience.com. My screensaver is Pooh and Friends - think I got that from the same site.
At home the wallpaper is a photo taken of DD & DS is 2000 with Mickey in his tent in Toontown and I have a Bugs Life screensaver.
I too swap between a lot of Disney ones and our own pics of the kids with Disney Characters but just now i have Matthew McConaughey nearly nude which my MIL turns her nose up at in disgust everytime she sees it.