First time poster and this seems a really good place to jump in.
I know a fair amount of people who enjoy SciFi, but not just because it's SciFi (i.e. they aren't going out looking for the next SciFi book, just looking for a good book).
I guess the question is, what is the definition of SciFi? I don't have the answer, myself.
One could suppose that for the purposes of this discussion the reference is for speculative fiction involving future worlds, galactic civlizations, etc., (what might be hard core? Would I be right on that?). The Dunes and Foundations of the world, I guess.
It's a shame that more people aren't drawn to the genre. People tend to enjoy stories wherein the characters are pushed to the limit, challenged emotionally/physcially/morally in situations of high drama. No genre can do this like SciFi because, by definition, there are no limits as to where the story can take you (or the characters). I guess the "science" aspect sometimes scares people off.
Just my 2 cents. Like I said, first time poster. Don't hurt me.