I didn't do more than take a walk in one port on my cruise a couple weeks ago. Some of the ports I've visited so many times that there isn't much more to experience. On top of that, some of those same ports used to be my favorites, but the ships have gotten so big and so many people in port that it just isn't an enjoyable experience. I didn't used to understand the phrase "cruising for the ship" but it is something I do as well now.
We all enjoy different things for different reasons.
Happy cruising!