I'm probably on that camp that needs to rearrange things every once in a while to get rid of that funny feeling that things are already getting too old and too familar. Today I'm retiring my current theme (too bad the finished work didn't see the light of day -- but then again, in software, as in many other "craft" industry -- who actually has a 100% finished product?).
No backups, fresh start. :) Ahhh, to be free again.