Cricket is an Appendix.
We chase cows, do Gymkhana, and I must say she's a b*tchin trail horse. Extremely sure footed, very smart, spooks at nothing. She's great around cars, bikes, trucks, whatever.
I've known tons of Appendixes that can do just about anything. Dressage, jump, western, cows, you name it I'm sure they can do it.
However as many Appendixes that I've known to be great, calm, wonderful horses, I've known just as many that have been total spazzes and not so good. Just like any horse, It's all about the training and effort you put into them.
"I was eight years old, and I've never forgotten her face when she told me about watching you ride. She told me she saw you, and your horse was dancing in the moonlight."
-- A.C. Crispin's "Sylvester"