I use guy and bud every once in a while. If someone were to call me one of those or chief or boss, I'd give them shit for it because it is certainly condescending, but I wouldn't really care too much because I do the same thing.
My doctor had been calling me boss for a while and I asked him why one day. He said I reminded him of his ex boyfriend and he used to call him boss too. I always thought it was strange that he used to feel my balls when I had a sore throat.