I like a KC style sauce as I'm not into the smell of vinegar. My ideal sauce would have no ketchup or vinegar, be sweet on the front end with a bit of tang in the middle, and heat on the back end.
Raichlen's sauce posted above looks promising. Maybe I could substitute the acidity in lemon/lime juice for the vinegar, replace the ketchup with tomato paste, and add the apple juice and honey as suggested till it has the amount of sweet I like on the front end. Then I could add some of the serrano or jalapeno powder I made a couple of weeks ago till I get the amount of heat I want on the back end.