Speaking of love, this wallpaper (inspired by a t-shirt design from Insanely Great Ts), from Flickr artist Ben Adamson says it simply from the heart, with a subtle flock-style design in the wallpaper itself to give it some lovely texture. Used with a Creative Commons license.
Here’s a mighty fine first effort from Flickr artist neptune000, who says, “I was searching for new wallpapers for my Macbook and I finally gave up and decided to make my own.” Used under a Creative Commons license.