Creative people combine playfulness and discipline, or responsibility and irresponsibility. There is no question that a playfully light attitude is typical of creative individuals. But this playfulness doesn’t go very far without its antithesis, a quality of doggedness, endurance, perseverance. Psychology Today: The Creative Personality.

All the creative people I know fit most if not all these traits. Mihaly Csikszentmihalyi hits the nail on the head with some fascinating research to back it up.