Even on the 3 day cruise, my DH, DS , and 2 DD's dressed up each night for dinner, and really enjoyed it! It is not too often that the girls get to wear dresses, let alone fancier ones, and my son (who is 17!) has always liked to dress in a suit and tie for special occasions. My DH, who is a boat mechanic, enjoyed getting into his suit and becoming part of the ambiance at Tritons. The girls wore dresses at the less formal dining rooms
(AP and PC), while I wore a pantsuit. The gentlemen in our family wore resort casual (polo shirts and nice pants) for Parrot Cay, and a shirt and tie for Animator's. Both DH and I dressed well for Palos, as did everyone else there we saw. I agree, if you rather not dress up, it is your choice, and there are dining alternatives for those who wish to wear shorts and T shirts. Keep the formal/semiformal nights!!