I have lived a total of 9 years overseas as well as traveling extensively. I have been to 78 countries and still want more travel.
My wife and I usually take trips from 3-7 weeks in duration. We never stay in one place, we are on the go a lot. We normally combine a cruise with a lengthly land trip.
For example, we went to England and Wales in 2017 for four weeks, rented a car and had a great time, even visited places where our ancestors came from hundreds of years ago. Then we took a 15 day TransAtlantic cruise back to the USA. It was great.
Did the same thing in 2018 flying to Australia and NZ visiting by land for 4 weeks, then took a 23 day TransPacific cruise that included Fiji and Hawaii, ending in Seattle. We don't want to do any more 7 week trips, but still do 3-4 weeks depending on where we go.
Our next big trip is a Safari in Kenya and Tanzania. After that, we still have more of the World to see. We never take the same cruise again, but we have been back to places we liked, but not a lot.
We don't fit any of the categories mentioned in the article.
One thing we have learned, since we are in our early 70s, and recently did Machu Picchu and Cusco, Peru. The altitude was 8-12000 feet and we did a lot of walking up and down hills for four days. After the remarkable visit to Peru, we had a full day to relax before our cruise. We needed that rest. DO Machu Picchu before you are 70.