Yeah, later in my career, I did a lot of presentations, seminars and training classes. Fly out, do some talking, fly home. Flying, and the whole airport scene gets old real fast, but other than that it's a good way to make a living.
Work doesn't have to be some kind of burn out experience. I had some good times, worked with good people some of whom are lifelong friends. I've been to every major city in the US and Canada, met a lot of people.
Also always found a lot of satisfaction in doing my job well.
However is sure is nice being retired, mainly because my time is my own. I didn't mind working so much except that it just took up too much of my time.