I turned 65, the Admiral wanted a house and we had traveled for 10 years and 25,000 (last 3 years commute cruising) . I also started getting really tired during a multi-day passage and didn't want to do much of it anymore. Continued cruising means I'd have to.
Interesting thing for us, after a while it all started to look the same. I guess that means it was time to move on.