I agree with everyone else. You can only do about 3 different 7 day cruises and the rest are port you will have visited before. It is not easy to sail only in the Caribbean and not repeat. BUT, there always seems to be something new to do or try. We have been to Cozumel 3 times and still have not had a problem finding ecursions we are interested in to go on.
We like seeing different ships and you should experience the Freedom if you can while it is still "new"
Carnival Cruise Lines:
Fantasy 90, Celebration 95, Victory 05, Conquest 05, Spirit 6/06, Freedom 6/08, Holiday 7/08, Victory 6/09, Valor 9/09, Dream 6/10, Splendor 8/10,Conquest 8/11,Magic 11/11,Triumph 4/12,Spirit 7/12,Freedom 11/12, Triumph 2/13 - The fire cruise
NCL Dream October 2006, RCCL Mariner OTS June 2007