I'm a volunteer mechanic in a not for profit bike shop and while there are a few bikes I find enticing, there are a great many more of the cheap clean-em up, make-em safe, get them out the door to a new home variety. (All of our bikes are donated.) Naturally, I added fenders, changed pedals, swapped saddles, etc on my own bikes. But even on the bikes that are going to come and go fast, I find myself thinking "What if someone did X...?" Thus my question: Have you ever bought/found/otherwise acquired a bike you didn't immediately start mentally redoing?
(I wish I could say my problem was confined to bikes but I rarely precisely follow knitting patterns as they're written and I've been known to grab the scissors and re-cut parts of my hair after I come home from the beauty school.)