The last time I was on a huge ship was, 8 years ago, 5 years ago, 3 years? heck I can't remember when was it, maybe because I usually travel by plane these days. Traveling by plane these days are more convenient and the plane fares are also affordable compared before, as long as you can get hold of perks and promos that the airlines are giving sure you can travel anywhere with low low fares.
On the other hand traveling by ship is also very convenient if you have lots of baggage with you and as long as you are not in a hurry to reach your destination.
Also you'll get to experience and enjoy the beauty of nature while on board a ship.