I like desktop images because I make them. I don't like them when using a serious application like Photoshop. Here's where Desktop Curtain comes in handy. I use it to provide a neutral gray backdrop for real work and have it placed on top of my desktop icon so I have a clear grey background with no icon clutter.

With no CPU overhead and little memory (I've checked), I have a neutral desktop for work or screenshots. A contextual menu quit and it's gone, I'm back to my desktop picture. I used to use Backdrop.app (a fine little freeware app.) but DC requires no dock icon and can never be the foremost app. This means that all your open windows automatically float on top of it withour having to click on a dock icon to bring them forward.