On the one hand, studies suggest that people who are happier are more creative, more resilient, more engaged, and more persistent in the face of difficulty and frustration. This would suggest that happier people would tend to be better artists (or whatever) than less happy people.

Can artists be happy?

Stereotypically, artists are known for being moody, brooding, depressed types. But a new study of working artists in Europe finds that they're actually much happier with their jobs than their non-artist counterparts.

Are people who do art happier?

This seriously suggests that the link between art and happiness is true for many more people than just those who consider themselves to be 'arty'. A review of the current literature and research available suggests that arts and cultural participation improves self-reported happiness and life satisfaction.