I have to cosign this notion. I am a 28 year old man, and I have always not liked fiction. I only read non-fiction. It is most interesting to me, and I enjoy learning, and like to learn from people and things that have actually occured. At this age, I am extremely focused on my career (aka: business), and therefore I read mostly non-fiction business related books. And just because thats what I'm interested in, I dont think my preference will change even as I grow out of the 20-50 year old bracket.