Me? I'm a seasonal desktop and mobile background changer. I update them about four times a year, and then I keep the "used" ones in a folder, and will occassionally look back on them. Like those who obsessively catalog their days on their calendars or datebooks, or who are much better at keeping a journal than me, looking back through them reminds me of what I was working on at a given time of year. Sounds weird, but I like that.
Apartment Therapy has rounded up eleven great websites to snag free wallpapers for your iPhone, iPad, and other smartphone and tablet devices.
For other free wallpaper and desktop background downloads, check out the ManMade archives: