I don't read modern horror novels, but I do enjoy some Victorian horror (at the risk of starting JD off on the differences between Gothic, horror, ghost stories, etc.). I think I read a pretty wide range of fantasy -- I don't care for excessive violence, which makes it particularly odd that I have been reading Carol Berg lately -- but not nearly so much science fiction as I used to. I read books written for adults, for teenagers, for children.
If I look at my bookshelf of favorite books, I find that I lean very heavily toward women SFF writers. As a gross generalization, they tend to focus more on the mental and emotional lives of the characters than the men do, which is what I like, and in the way that I like. With the YA and children's books, it's probably a 50/50 split between male and female writers.