I don't know if my bass would be unplayable by anyone else, but maybe uncomfortable. I use heavy gauge strings and a medium action. Not too high or low.
Like someone else said, some buzz, when it's intentional, can be great. If a bass buzzes and clanks excessively, due to a poor setup, not so good.
Fender Jazz Bass Club #1021,Blues Bass Players Club #172
Lefties Who Play Righty Club #288