"I was borderline depressed for years. There was a sadness over me, a melancholy. That's always been a part of me - those are some of the things that lead you to the arts. It's something I still think about, not that it brings me sadness at this point; it's a void or fracture that happened so early that now I have to address it in the healthiest way." Oscar hopeful Mahershala Ali has had the blues for years.