I'm thinking about clean installing on my early 2011 MBP (which came with Snow Leopard), then I installed Lion, and then Mountain Lion - I suppose it's about time to do a clean install. Just need to research if I can perform a clean install without touching my Boot Camp partition.
Unlike myself, you said you clean installed every major release, so it's not like there's going to be old system files lying around. From what I've heard Maverick's is now very good if you just do an upgrade (not a clean install). I'd suggest not doing a clean install, but if any problems arise, then you can always do a clean install later.