"Experts say mental illness does not necessarily cause creativity, nor does creativity necessarily contribute to mental illness, but a certain ruminating personality type may contribute to both mental health issues and art."
Wow. That is some groundbreaking science. It never would have occurred to me on my own. I'm glad we live in a world where there are scientists and experts to uncover these mysterious connections for us. I hope we're paying them enough to do this kind of intellectual heavy lifting: "If you think about stuff in your life and you start thinking about it again, and again, and again, and you kind of spiral away in this continuous rumination about what's happening to you and to the world -- people who do that are at risk for depression." (That's Paul Verhaeghen--psychologist, novelist and one hell of an articulate guy).
Now if they can only tell me what defect in my brain chemistry led to the decision to pursue poetry rather than, say, astrophysics or nursing or some other, more-conducive-to-cash-flow vocation, we'll be all set. If they can come up with a drug to combat the aforementioned defect, that's even better.