OMG, she would be a stunning reining horse. Not many of them are over 15 hh anymore. LOL She would be a monster next to the rest of them. I am so glad that you are getting along with her better. There really is nothing more frustrating than wanting a horse to do something and they either refuse or you don't know how to ask them and they get confused. CONGRATS!!!!!
I will give you another snippet of information, the more circles you lope, the more level and slow she will travel. That is how Dad used to train WP horses, just millions and millions of circles. The didn't move like the peanut rollers but they were rated (speed), natural, and flat like a good horse should be.