Some horses just thrive on work. Dobe is that way. When my brother was using him in a feedlot working 12 to 15 hour days every day, he would have to push Dobe out of the way to get to the other horse he wanted to use. Dobe would run up and put his nose in the halter cause he wanted to go to work. Down here, he doesn't get used that hard but when I do need him for work, he is eager to get into the trailer and you should see his face when he first spots the cattle. He gets darned excited.
IMHO, that sounds like a perfect excuse for you and hubby to go out with the horses more often.