We've stayed at:
Country Country x2
Sunset at the Palms
Point Village x2
Couples Negril
Breezes x2 ... now Grand Lido, once
Treehouse
Rooms Negril x4

The only one that I wouldnt stay at again was Sunset at the Palms, because of the location of their beach, across the road.
For AI, Couples is awesome but very expensive. We've gotten great last minute deals at Breezes/Grand Lido, and its beautiful. We love CC, but pricey and I'm afraid that they will ruin it by making it bigger. Treehouse is very nice also, with an amazing breakfast. Our fall back is Rooms Negril. They have very nice clean rooms, and a great spot on the beach. The area has lots of great bars and restaurants.
So, I agree. Our decision is mostly based on price. Each place has its own charm. We have our favorites, but also willing to try something else if the price is right.