Most are riddled with self-doubt. They are usually bald. They should have big hands, but often don't. They were social rejects as adolescents. They go home after the gig and play with toy soldiers.
Pianists have a special love-hate relationship with singers.
If you talk to the piano player during a break, he will condescend. Bassists are not terribly smart. The best bassists come to terms with their limitations by playing simple lines and rarely soloing. During the better musical moments, a bassist will pull his strings hard and grunt like an animal. Bass players are built big, with paws for hands, and they are always bent over awkwardly.