From Science:
Narcissists, new experiments show, are great at convincing others that their ideas are creative even though they're just average. Still, groups with a handful of narcissists come up with better ideas than those with none, suggesting that self-love contributes to real-world success.
Narcissism and creativity seem to go hand in hand. Creative people often appear self-important, hungry for attention, and unconcerned with others' ideas and opinions— all traits narcissists share. Think of Pablo Picasso, famous for his iconoclastic paintings but infamous for declaring, “I am God.” Like Picasso, narcissists often rise to positions of importance in art, business, and other endeavors, suggesting that they have ability and ideas that others do not.
More here.