Copper, the Royal Decameron has a good selection of food... and a nice combination of local food (which I love) and North American type food (that lots of other people enjoy). Yes it is all inclusive. All the water stuff is included, even a guy that will take you out on a small sailboat to cruise the bay. The hammocks are to die for when you need to put your feet up and of course the entertainment can be great (the decameron dancers) or mediocre (tourist participation). They have a disco on site which depending on the crowd that is there can be a ton of fun. Additionally Margaritaville (more tourist though) and Pier One are great for late night parties ( my personal fave is Pier One). I like walking down past the hip strip, there are lovely gardens and of course the famous pork pit with delicious food, doctors cave if you want a different scene.... I like shopping at some of the local 'malls' and bigger stores in MoBay. You don't have to leave the resort if you dont want... but I like going into MoBay to look around even the movies once (long story how I got there, but glad I went..lol)! The staff really make it great. I love that it is 5 minutes from the airport too.
Seastars food is sooooo good. Best quesadilla I've ever tasted was from there.
good luck!