I was forced into retirement by my health. When I regained as much as possible, I took on a totally different type of job, and enjoyed doing it for 5 years. I started that one at 70, and hung it up permanently, when I was 75.
Since then, I've kept myself busy writing, and enjoying sites like we have here. The writing has made me a few bucks, and I've gotten the opportunity to travel to various locations throughout the US in the process. I've turned down opportunities to go overseas on gigs though, because I'm not as spry as a person needs to be to navigate everything.
I won't quit writing. The only thing that will stop me is when they turn the lights out on me permanently. I'm 84 now, and figure I have a few good years left in the tank. I'm going to enjoy them. But, if I suddenly disappear one day, know that it was the lights turning off, not because of anything else. I don't quit on things that easily.