I don't think I'm morbid by nature. Serious writers have always written about serious subjects. Lighthearted material doesn't appeal to me, and I don't read it. I think I'm a realist, with a realistic sensibility of history and the tragedy of history.
Never be ashamed of your subject, and of your passion for your subject.
Detroit, my 'great' subject, made me the person I am, consequently the writer I am - for better or worse.