I think I pretty much enjoyed most things about my childhood. It is hard to choose a favorite, but I think that the weekend fishing/camping trips would run neck-to-neck with the horseback riding.
We used to go camping almost every nice weekend during the summer. Mom would maked fried chicken and potato salad, Grandpa Bailey and my dad would load the boat up on top of the car, and we would drive out some pokey little dirt road, to a sparkling lake hidden back in the woods somewhere.
Mom cooked the fish we caught right over the campfire in an old cast iron skillet, and we even had them along with hotcakes and eggs, for breakfast. All in all, it was a great part of my growing up memories.
I can't remember not loving horses, and spent my early years hanging out at the nearby horse corral, until my folks finally got me a Welsh Pony at age 11. After that, I pretty much lived on or around my horse. I was in 4-H, and had a full sized horse for that, went on trail rides, rode in the Spokane Lilac Parade, and had lots of fun at the summer Gymkhanas (playdays).
Later, I raised my first filly, a beautiful pinto, and she became my 4H project, and later, my preferred horse to ride.
My kids grew up about the same way, since we always took them fishing and they all had their own pony when we went horseback riding.