My 20s were spent living the single bachelor party life in London in the 90s. Noughties I had 3 kids and emigrated to Australia. Then I hit 40...then 50. Now I'm 52, still in good health. I have a job, a partner, family, a few savings. Sure I haven't written the next great novel or got a PHD, but I sure as hell don't worry about what might have been.