What's you're discipline?

I ride my 17 year old Arabian mare western. I run her in speed cles like barrels, poles, speed and action, keg bending, blah blah blah. I love the rush of the excitement when we run together and we're pretty good at it. I've been running her for the past three years (it'll be four this year) and I'm going to keep going until...well, I don't think I'll ever stop running. She'll get too old for it though, but she's a fiery little mare! Just thinking about it makes me excited! I've been riding for almost ten years now. I used to do western pleasure and I tried jumping, but it was too awkward for me. I've always hated riding English anyway. Nothing against those that do! I just don't like it. Good question.