Hey I was just wondering what everyone jumps in.
Personally I show jump in a waterford eggbut.
I go cross country in a western bit. It's a myler level 2 low comfort barrel port mouth piece with a western dee with hooks for a tiny bit of leverage as the cheeks. http://www.toklat.com/myler/mbits_04.html
He seems to really like it. So who am I to argue with my horse?