I like the idea that we are nomads. One idea that we conjured up with one group of mine, but it never took off, would be that the PCs are a wandering rock band, complete with their own gig bus! :D
30 after the bomb is fine with me. I don't want my character dwelling in past glories.
Edit - Oh, and my character idea is nomad greaser, but if someone else wants to play a mechanic, I'll think of something else.