jdch28 wrote:So... I'm going with the default dumb question. What makes it so much better than the rest?
There's a few things.
No major "hassling" by overzealous "salespeople" at the port. If you wandered through the "straw market" last time at Labadee, you know what I'm talking about. And there are places that are worse. Nassau, anyone?
The entire island is only about 8 miles long and it's pretty safe. With a population of only 4,000 or so, it basically doubles when a cruise ship arrives. It's pretty hard to get lost even if you rent a golf cart and go off on your own.
The pool, pool loungers, beach and beach loungers are all free by the cruise center and are literally right at the end of the pier to the left, through Margaritaville. (It's the largest M'Ville in the Caribbean and one of the largest on Earth.) If you don't want the noise and partying from M'Ville, if you go to the right you'll find a much quieter beach and also the John Glenn commemorative exhibit. We tought the snorkeling was better by Jack's Shack, though.
You can snorkel right off the beach near Margaritaville and on up to Jack's Shack. When I was there last year the snorkeling had gotten much better once you get out past the surf zone. Due to the dredging for the ship-channel, there are spots where you can free-dive down to 40 ft. It wasn't easy, but I managed it.
Speaking of Jack's Shack, it's a bar further up (north) on the beach from Margaritaville, a lot less touristy and owned by an American ex-pat. If you visit their website you can get a coupon good for a free shot of rum. They're good people and their dog, Topher, may be the most famous canine in the Caribbean.
(There are more bars and stuff, I just know M'Ville and Jack's from experience.)
"Serious" scuba divers and such can book an excursion to go to "The Wall," which is a drop in the ocean floor from 40 ft to over 7,000 feet, really close to the island. It's a world-famous diving site.
If you'd rather do something a bit more immersive or cultural, you can take a taxi or rent a golf cart and visit Cockburn Town, which is the (small) town on the island. (It's pronounced "Co-Burn Town," but don't tell Andy. I think he enjoys saying it the other way.

) Cockburn Town is the capital of Turks & Caicos...which is kinda weird because most of the people and the resorts of T&C are on Providenciales, the much bigger island to the northwest. So, there are a few cultural places to visit there.
There's also a lighthouse you can visit at the northern tip of the island. All of this is easily accessible by renting a golf cart or full-day taxi tours. (Maybe bicycles and scooters, I'm not sure about that.)
Basically, there's a fair amount of things to do, and many of them are free and close.