The wall of family photos has been done a million times. But we really like this trend we've been seeing of incorporating some kind of tree imagery (either painted or decal) and using that as a backdrop for hanging family portraits. Using vintage and rounded frames for the photographs adds to the visual interest, and to the idea of making something old new again.
As usual, we found tons of beautiful ideas across the web of people doing just this. We are definitely incorporating this into our space, when we have 5 spare minutes.