Can't say for sure, but when I first answered the question years ago I read as near to all S.F. as anyone is likely to, but in the intervening years I've read a lot less S.F., a few Fantasy works, and a whole lot of mystery/thriller books, probably more than S.F. today. But I feel a part of this forum and I don't think I'd leave just because my reading habits developed away from S.F. and Fantasy. Or perhaps they came here for help with their book which was not S.F. or Fantasy --- Maybe one of these explains how that came to be.