IMO, the reason people might like Negril diving better than other areas of Jamaica is because it is on the leeward side, so odds are better that you will diving, without the wind. I like diving with Sandals or Couples Resorts because it is easy and simple, not because it is going to provide the amount of sea life that might be elsewhere. The water is just as blue, warm, and clear as anywhere else in the Caribbean, plus you will see the same sea life as anywhere else, maybe just not in the abundance as you might find elsewhere. If diving elsewhere, you might have more fish, but won't experience the types of resorts and culture you can get from the Sandals and Couples Resorts.