As a writer, you need to see beyond the skin of the world. Sometimes this is a blessing, but at other times it's a curse. Being a writer of dark fiction often means that you see only the bad stuff.
Whenever I look at a person, I see an animal twitching beneath the thin veneer of humanity; when look at a group of people I see those animals begin to dance. It's not much fun viewing people this way. It can make you paranoid and suspicious. But it's just the way I look at the world, through a dark-tinted lens.
I sometimes wonder if writers of lighter genres see nice things beneath the skin of the world. A lot of the time I wonder what happened to make me see such darkness and despair. And occasionally, I'm glad I have this grim perpective.