I just spent my weekend at an arab show. They did halter, showmanship, they did the walk trot classes, they had a therepeautic riding class, they had country pleasure, hunt, they had sidesaddle, driving, bridle path hack, english, and western, plus horsemanship classes and dressage suitabity. They also did trail in hand and undersaddle. It's actually a very versatile breed. The one thing I would say is a shortfall to the breed (IMO) is jumping, they are hollow backed...
"Be a best friend, tell the truth, and overuse I love you
Go to work, do your best, don't outsmart your common sense
Never let your prayin knees get lazy
And love like crazy"