My fiance like the close proximity to the airport, and being able to pay one price and not have to worry about anything else!
I stayed at the JW Marriott in Cancun, and I was spending$100 in drinks a day (12 dollars a pop+ tip)! Also meals were 25-50 dollars a person at the restaurants.
Same thing at the Atlantis Paradise Island, Bahamas....food and drink was close to $150-$200 extra a day.
At an all inclusive I don't have to feel bad if I didn't like my dinner, because I can always pick something else without worrying about cost.