I feel the same way. If I buy a vintage bag in mint condition, I feel like I am destroying the value if I use it. I'm not rough on bags at all but I am very picky about having them remain in perfect condition. But I prefer to buy a used bag in great condition than a new with tags bag because it seems so final to remove the tags!
I think we all have this in common! sometimes now even AFTER i rehab them I just want to hang them up to look at them and tell everyone not to touch LOL