In my 20s, I was more cynical/despairing (even though I still wrote comically), but I often sent audiences home with rather dark last moments. After a while though, I don't want to send the audience home bummed out, or distressed ... I want to see what's hopeful. I'm not overly cheery all the time, and yet I'm not suicidal either. I do think people can make choices that make their lives happier.
