he is probably happy doing whatever you ask as long as you don't drill him all the time, it is good to here you do different things with your horse so he doesnt go sour about jumping. You know when your horse is happy better then anybody. And don't worry if a friend thinks he's not happy, as long as you know your horse. I have seen a horse that seemed like she enjoyed NOTHING because she would pin her ears back at people and stuff, but I got to know her better and she was one of the happiest horses I ever met, she loved being grumpy but still having somebody that loved her no matter how grumpy she was.
If there are no horses in heaven... im not going.