Wow, I love your rehairs, Himmie! My sister and I own all of the U.S. Big Brothers (we just got Tex this year, and he's adorable). We also got Waddles and Leaper this year, completing our set of Baby Brothers. I guess the only U.S. guy pony we don't have is Daddy Bright Boquet. And Lucky and Clipper. We definitely want the Mountain Boys, especially (in my case) Sunburst! My sister's getting Fireball for Christmas, shh, don't tell her.
(She's not on the Arena.)
My favorite Big Brother might be Salty. He was among my first as a kid. Incidentally, all of my big brothers at the time came secondhand, so I had no idea they were boys. Salty was clearly a boy, but I made Steamer his wife and Chief his daughter.