Art for the Site

So, I have a friend of mine on stand-by whom is a rather skilled artist by their own accord. They've also divulged that they've been practicing speed-painting backgrounds. I went out on a limb and asked if they'd be interested in creating some backgrounds for us. Notice: Backgrounds.

As in, for all our currently active categories.

They've expressed interest in doing so, and as such I'd like to see suggestions from our people on the exact nature of how these backgrounds should turn out. I would really like to keep the blue/black/grey color-scheme for each picture, though that's more or less in keeping with the site's already existing color-scheme. 

In the interest of seeing what ideas you have, I wanted to extend an invitation to you all to shoot ideas. I would also like to thank Ander, who's clearly expressed interest in the matter gave me reason to pursue it. And.... go!