I think having personal art in your home can make the difference between a beautiful house and a beautiful home. Whether that means hanging your children's artwork, or being a bit more literal like Liz at decorating the ville.
The idea is originally from (The Giving Tree Family Tree) in Martha Stewart Living. She did a wonderful job and has a tutorial with extra tips on her blog. I would consider doing one for my own home, but we would have large chunks of our family tree missing!
I am currently working on a gallery wall for my living room and can't wait to put up some of our treasured family art into the mix.