I feel the pain of living with relatives and not being able to have a tk pic up. I probably wouldn't anyway, since I don't need to be a constant horn dog : P
Yes, I'm a sex addict, it's a burden, my cross to bear (brownie points if anyone recognizes where that came from)
Anyway, to the main question: I have a lot of different background choices. I keep them all nicely tucked away in My Pictures folder. I have a lot pop icons such as He-man, Thundercats, yadda yadda. I have artists that I really like such as Azam Ali, Nightwish, Leaves' Eyes, eRa. I have a picture of a very sexy Night Elf WoW wallpaper (though I don't play the game) and I have a pic of a Fremen overlooking a spice harvester.
I'll post a few of my more odd and/or rare backgrounds.