I've been retired for 20 years. Now, as noted elsewhere, I plan to do 4 years of crap exciting learning so I can teach in Asia. Anything that gets me there and pays the bills. It's a different world. I'll be living my second life.
Actually, I love to learn, so though I joke, and the work load I'm planning is intense, I'll have a ball working toward my degree. I'm happiest when exposed to new things. A book, a class, a subject, a city, a country, a continent... how could I not be excited?