I think I'll make it the official name of this syndrome and see if I can get it listed in the DSM-V!

Post-cruise depression - syndrome that affects RSSC cruisers after getting off the ship. Symptoms include feelings of fatigue, depression, hopelessness, inability to do laundry, and leaving the luggage out since it's too painful to put them away as it would mean that the cruise is finally over. Treatment is symptomatic and ultimately involves booking another RSSC cruise as soon as possible, preferably one with a lot of LCTers onboard. Prognosis is usually fair with proper treatment administered as soon as possible. Preventative therapy involves not getting off the ship which unfortunately is not usually a covered benefit under most HMOs.

Masaki