I've always been partial to Wheelhorse, but in the end, if the price and potential profit was there, it came home with me. JD, Craftsman, Jacobsen, Kubota, whatever...
Boats, couple cars, numerous tractors, RC airplane stuff (very little volume there, mostly just to support my hobby at the time), small lawn equipment (chainsaws, blowers, etc), and the list goes on.
In the end, parting out boats was the most profitable per hour spent on it. Had a couple REALLY good tractor flips, though. Only one or two deals that didn't end up great, which some were and some were not my fault. I made them right in the customers' and my own eyes, though.