I recently saw this article on Neatorama about a study suggesting that artistic people are happier with their careers than workers in other fields:
Any profession that allows a degree of creativity will be rewarding on some level.
I feel fortunate to have a successful career in graphic design, because I've always loved observing & making visual art.
However, I also try to venture into other types of projects for the sake of creative exploration. An artist with a wide breadth of vision can express ideas through any medium.
Despite the long history of disturbed artists, expressing one's inner vision & bring forth new things into the world is a joyful & fulfilling experience (...for those of us who are not completely crazy).