All horses have potential =]
Me jumping my TWH 2.5 ft.
I have had a TWH for 10 years and he had mainly been a pasture ornament for those 10 years, and a good one at that. He is jet black and 16.2 hands, a true beauty.
When i turned 9 i decided to start riding him, and he was handful especially for a skinny 9 year-old like me. He was mainly a pleasure horse, i had no intentions in showing him.
But as the years passed, i started to c potential in him and i was notified that there was a simple local show that was to take place in a few months. I had to change a pleasure into a show horse in a few months!
But he had a bad habit that i had to break in order to show. Whenever i rode him we would just gallop across the pasture over and over again.(once again, i had no plan in showing him so i didnt c anything wrong /it)I had to train him to be consistent in all of his gaits and it took a while, but we were finally ready.
I didnt know much about walking horses(ima hunter-jumper girl=D) at the time so, i entered him in the w/t and other equitation classes, since there were no gaited horse classes.
He ended up doing very well at the show, in fact everyone thought he was a TB. Now i can show him in hunter classes and then turn around and show him in the gaited horse classes and he does just as well. He has great versatility and i think every horse can. Good luck w/training ur horse! ;)