it's not just a stereotype of the "tortured artist" -- artists really may be more complicated people. Research has suggested that creativity involves the coming together of a multitude of traits, behaviors and social influences in a single person.
Musician and comedian Reggie Watts on juggling a variety of projects, making technology work for you rather than against you, surrounding yourself with the right people, and letting “fun” be your primary creative impulse.
If quitters think they can punch back at their old bosses without fear of alienating potential future employers, they might be right. The supply-demand curve of the labor market is working in their favor, and employers are growing less choosy.