Yeah I guess that is true. I think in my mind 'hard sci-fi' is more of a trait than a sub genre. Actually now I think about I think maybe purist hard sci-fi fan

Yeah I guess that is true. I think in my mind 'hard sci-fi' is more of a trait than a sub genre. Actually now I think about I think maybe purist hard sci-fi fans might not be very big on Peter F. Hamilton. Greg Bear would have probably been a better bet for an extra recommendation!