He didn't mention the good stuff, if I were to guess: the joy of seeing his kids grow up. Falling in love. Teaching students to the best of his ability. Becomin

He didn't mention the good stuff, if I were to guess: the joy of seeing his kids grow up. Falling in love. Teaching students to the best of his ability. Becoming an expert in his field. It sounds to me as if he has had a great life so far and just looks forward to more to come, and has a few minor regrets that aren't severe like, don't go to jail, don't do hardcore drugs, etc.