My first rep was a white dial/black subdial Speedmaster, which I picked because I had grown tired of the black dial Swiss Army watch that I had been wearing for a few years. I ended up not really liking the white/black Speedy combo, and as I added new reps the Speedy got less and less wrist time. An attempt to sell it was unsuccessful, but then I thought to contact the original dealer, Paul, to see whether I could get a replacement dial. Voila! A new, beautiful black dial/subdial speedy that has renewed my appreciation for the Speedmaster.
The second thing I would do differently is skip most of the $100 "what the f__k" impulse rep purchases that are gathering dust in the bottom of my watch case.