He doesn't have depression. He is just sad that he doesn't have time for everything he loves. He loves spending time with his family, and has been promising his wife that he will have more time year after year, but hasn't kept up his promises. He also loves his job, and every time he takes a break, he gets an itch to work on something. He decided not to retire for now, but he is reconsidering his priorities, and whats important to him.