Board Thread:Off Topic/@comment-3965075-20150620202833/@comment-26397825-20150630011605

In a horror/dark/angst/thriller story, you kind of expect the main characters to have a dark background, and one who has a fairly normal background is seen as the epitome of cheerfulness in that universe.

That being said, in a bright/happy/cheerful/fluffy story you expect the characters to have a happy backstory, and those who don't (whether they're actually dark or just neutral) are seen as the epitome of sadness in that universe.

It really does depend on the universe it's in.