Have you ever considered making wallpaper sizes of your art? It's a very popular category, it would allow you to submit to some of the popular wallpaper/customization groups for even more exposure, plus it would make your art more usable in the sense that (hopefully) more people would be taking more time to take in your art by viewing it longer than through just a quick page view and then moving on you know?
I (of course) don't know what knowledge or experience you have with wallpapers, but I could suggest some of the more common and popular resolutions for them. You wouldn't have to go nuts with the backgrounds, in fact, the main focus is your characters so the backgrounds would be more ambient than anything although your backgrounds really compliment your characters.
I downloaded your latest even though I wasn't sure what to do with it. I just know that I liked it enough that I didn't want it to just get lost in the mix of a trillion other deviations and I didn't want to just toss it into my favs, so that's where all of this comes from.