The Coral Princess is very nice. My husband and I stayed there last April and it's wonderful. We also are not particularly interested in nightlife. We're not divers, but there is a scube shop right on the property, Pepe Scuba, which many people on other boards have recommended highly. Right in front of the Coral Princess is a coral reef. No walk-in beach, but a ladder lets snorkelers drop right onto a reef. I know that the dive shop takes groups out right from there as well. It's certainly worth looking into. The CP is north of town about a mile and is very quiet. The staff is stellar and very attentive. This is not an all-inclusive, though, so you might want to continue looking for that. Beautiful rooms and so clean!! Google "Coral Princess" and you'll find their website. I think it's www.coralprincess.com, but I'm not positive. Good luck. Cozumel is a wonderful place. We're going back next Sunday, the 16th.