I'm working on a project with lots of images. Some of the images dont fill up the entire screen and if i stretch them, i lost relevant data. I'm thinking of strategies for a background besides just a black slug and having the photos against a black background. Any thoughts? What might I want to do for a background that makes it slightly more interesting?

in one project i duplicated the image, put it underneath the original, stretched it to fill the screen (or bigger) and blurred it. i think i may have desaturated it a bit and thrown a couple of other filters on it that i can't remember.
seemed to work for that project...