There are very few ailments that a good dose of warm Caribbean sun can't make better, at least temporarily. Having been on multiple cruises, I can tell you that they aren't really the place to do a spiritual quest---there are lots and lots of people, and in some situations like shore excursions you kind of get herded around like cattle. There's a lot of drinking and noise, but if you can make your way to a nice island and enjoy a little beach time, it's really relaxing. (And the rum punch they bring you helps too. )