In all the years I've used Linux, I've never been inclined to post a screenshot (you've seen one desktop, you've seen them all). But I'm just so damn happy with this background that I had to share.

Alex Does Hoola on my Desk

If you look from left to right rapidly, not only does it give a sort of animated feel, but you'll risk straining an eye muscle.

<voice src="experience">Don't do it.</voice>

Making of Yuka