There is nothing like breathing underwater for the very first time. It takes a little getting used to (after all, human beings weren't designed to do that) but after a few minutes of awestruck wonder, most participants realize how easy scuba diving really is.
If you are looking for something a little more exclusive the Private Charter is for you. This is a great option for mixed groups of divers and snorkelers or just for those looking for more personal attention. The trip includes instruction, rental gear and all the normal ammenities but is reserved just for your group.