I think that age as a number is not nearly as important as health. You can be in poor health and be pretty miserable at 40 or 50. If you're in good health, you can enjoy things into your 80s.
Working at the Food Bank with my kids is an eye-opener. The face of hunger isn't the bum on the street drinking Sterno; it's the working poor. They don't look any different, they don't behave any differently, they're not really any less educated. They are incredibly less privileged, and that's it.

