I'm actually really glad this thread popped up...I have one scratch in my 07' JTS and a few spots on the raleigh professional in team livery, and thought they'd look better left alone. Glad to see others leave them a little rough too. If you;re bike is THAT perfect, it's not being ridden, and I like to ride my babies.
The only bike I don't ride is my three seat tandem schwinn...and that's only because it's hard to find two people who want to head out to the burbs to pick it up at my parent's garage. It's too large for my apartment.