I've never really been nervous about any concerts. I enjoy it so much. All that matters is getting the songs played well, trying to get them to sound as close to the record live, which isn't easy, because my music is quite complicated to play.
People weren't buying as many records. My record company did not want me. I went through three record companies, went on tour at the wrong time. It destroyed me.
Bipolar disorder, manic depression, depression, black dog, whatever you want to call it, is inherent in our society. It's a product of stress and in my case over-work.