AI can be done right if in a small setting. The Caves is a good example, no buffets, lines for food, need to make reservations. They will make anything you want for breakfast. The bar is left open when the staff leave. It's more like staying at some rich person's estate with their staff at your beck and call.
The AI option at Moondance Villas is another example. Eat what you want, when you want.
Of course both of those places are silly expensive.
Personally, I like a mix of having someone to cook homemade meals in my villa, making some things myself and going out to eat.
What kills me are the cookie cutter AIs where you have to get up at the crack of dawn to reserve a chair, you eat bland non-local food and they discourage you from exploring. That may be a fun trip for some, but that's not what Negril is all about, at least to me.