CCL Imagination seems to have one of the better call times. Docks at 1300, departs at 2200. So 9 hours. But their Key West visit is the abismal one. Dock at 0730, depart at 1400. Nothing worth doing on your own in Key West can really be done before 10ish in my opinion ...
Disney Dream - Dec 2012 4n Bahamas
Carnival Imagination - Dec 2011 4n Western
Carnival Imagination - Nov 2010 4n Western
Costa Atlantica - Dec 2009 7n Eastern
My opinions are mine and mine alone. They do not represent the opinions of The Walt Disney Company nor any of its subsidiaries.