Great idea! I've seen rings with silhouettes embossed on them but never a quilt- tricky design challenge!
If I was doing one I would probably include map outlines of the different places I have lived, and an airplane too. An open book symbolizing inquiry because I consider myself curious. Different symbols for my ancestors- a ship, farm animals, a loaf of bread, a boot, a rose. My goodness there are so many. It's a really interesting question! Symbols for my kids also, and my husband- I'd be appliqueing a LOT!