I understand why creative people like dark but American audiences don't like dark. They like story. They do not respond to nervous breakdowns and unhappy episodes that lead nowhere. They like their characters to be a part of the action. They like strength not weakness a chance to work out any dilemma.
Absolutely the worst thing about this job is the travel and being away from family. I have a wife and three wonderful children the kids are all active in sports and it's very difficult to up and leave and miss them growing up.