Many of you know that I belong to a writers group. I can’t tell you how many times a person comes into the group with their new project and someone asks, “Who is your audience?”
This is a fair question. You’re not going to be writing zombie erotica for a Christian audience. If you write a fight scene with a top notch assassin and you ignore the laws of physics by having a gravity defying sword, or use a rapier like a katana, you’re probably not going to have much credibility with adults who have a clue about the proper use of weaponry and know how to fight.
While crazy long fight scenes work for Hollywood, in reality, if a fight lasts ten seconds, you’re already dead.
If your spaceship goes ‘whoosh,’ hardcore science fans are going to scream and run.
This also goes for publishers. Publishers have their own requirements from subject matter to length of story. You don’t want to finish your awesome novel and find out you can’t get it published because it’s too long, too short, or doesn’t fit with their readership.