I write a variety of things, mostly non-erotic. On the erotic side, I like a well-crafted story for starters. If it's something that really revs my engine and the story sucks, it disappoints me three times as much.
I tend to enjoy good ol' "standard" boy-girl (and girl) erotica, nearly anything that has an aggressive or dominant woman (femdom much?), but I'm not a fan of pain. I also enjoy puppies, long walks on the beach and men being turned into women, with or without their knowledge and/or consent. Mind control, magic or hypnosis of any kind is also a whole lot of fun.