My thoughts on this issue are pretty much in agreement with what has been said.
I had some great mentors in my earlier years. Their advice was to make every style and type I was capable of making (straight knives, folders, miniatures, art knives, etc). If the customer didn't like the knife and you felt the same, stop making it. If the customer liked what you made and you did too, make more and ask for feedback from them. Use that feedback to improve each knife.
Smartest advice I got was to offer free refurbishing and sharpening. That gave me a chance to get it back, take it apart, see how everything was holding together, and make improvements.
I have one folder model that I have been making for many years and it seems to be as popular today as it was then, and a hell of a lot better built.
Roy, find a style you and the customers like, and keep improving on it. It might take years for it to happen. It most likely will become your signature knife.