I would totally love to go on a cruise ship one day. 
Me too! I would love to go on a "Cruse to Nowhere" where the ship makes a 2-3 night trip without stopping at any ports on the way.
That does sound interesting. 
Transportation is not the only reason for crusing though, most cruses are "Closed Loop" returning the passengers back to where they left. 
What destination would be your ideal vacation for a cruise?
Puerto Vallarta
Puerto Vallarta () is a Mexican beach resort city situated on the Pacific Ocean's Bahía de Banderas.
PV or simply "Vallarta" is the second largest urban agglomeration in the state after the Guadalajara Metropolitan Area. The City of Puerto Vallarta is the government seat of the Municipality of Puerto Vallarta which comprises the city as well as population centers outside of the city extending from Boca de Tomatlán to the Nayarit border (the Ameca River).
The city is located at . The municipality has an area
Cruise ship
A cruise ship is a passenger ship used for pleasure voyages when the voyage itself, the ship's amenities, and sometimes the different destinations along the way (i.e., ports of call), form part of the passengers' experience. Transportation is not the only purpose of cruising, particularly on cruises that return passengers to their originating port (known as "closed-loop cruises"). On "cruises to nowhere" or "nowhere voyages", cruise ships make 2-to-3 night round trips without any ports