This is Ruwi and I'll just say this: there is a reason I am called a demon. I have evil fantasies to keep me sane and there are no limitations to whom they include.
Generally, one who has a personality like that would write angst. I am a romance writer. Not Lemon, because it doesn't seem like something I would like to get into, but other than that I pretty much all a-go for any sort of plot for romance. I suppose romance is something I can experience on paper rather than real life... everything usually turns out happily... either that or just interesting.