If you are interested in scuba diving, I would recommend selecting one or two off the ship. It sounds like your wife doesn't dive and this way you shorten the time you are away on the dive. Instead of having to tender to and from the ship to meet the dive shop, you simply go down to the sports platform at the back of the ship, suit up and go straight out to the dive sites on zodiacs. This probably saves over an hour. My least favorite dive is Table Top. I would speak with the divemaster and ask about the two best dives. As the water changes week to week, they are in the best position to recommend the best sites that week. I would recommend one on Bora Bora and one on Moorea would be a great mix. We have dove with outside operators and found there to be no great difference in price or quality of experience so we prefer the ship dives. The only reason in my mind to go with an outside operator is if you want to dive more than the ship offers. We are diving the week of November 13 so I will post a scuba update when I return.