Most hotels along the stretch boast their own section of private beach, so you can look into the various options to suit your needs. Try your hand at parasailing or one of the other water sports offered.
If it's diving you're after, head to West Bay, which is a predominantly residential area, but does have tourist accommodation. This is the same for the North Side and East End areas, which are the most remote places you can stay, but boast the island's best diving spots. If seeking out tranquillity by getting off the beaten track is to your fancy, these Eastern Districts will hit the spot, while the underwater treasures will provide as much entertainment as you could wish for.