The second ship in Carnival's Conquest class, Carnival Glory first set sail in 2003 and got a dry dock makeover in 2012, when many upgrades, including popular spots such as Guy's Burger Joint, the BlueIguana Cantina, and the Alchemy Bar were added. The relatively cozy passenger-to-crew ratio (2.5 to 1) on board the 2,980-passenger Carnival Glory makes for a familiar and friendly atmosphere. How inviting is it? Enough that this vessel gets its fair share of repeat cruisers.