I have cruised on several 100,000+ gross ton ships:
110,000 gross ton Carnival Liberty
116,000 gross ton Sapphire Princess
138,000 gross ton RCI Mariner of the Seas
160,000 gross ton RCI Liberty of the Seas
I have three more coming up--
Starting with a return visit to the Mariner of the Seas, then...
122,000 gross ton Celebrity Eclipse
220,000 gross ton RCI Allure of the Seas...
Obviously, I would do it again...
But, here is the kicker:
I would NOT go on the Carnival Liberty or Sapphire Princess again...
Carnival Liberty was the most overcrowded and poorly designed ship I have ever cruised on...
Sapphire Princess just behind that (well, a ways behind)
It is NOT only a matter of the size of the ship, but more the number of passengers compared to the size of the ship...Some large ships are spacious and well designed and do not feel crowded at all...You need to really look at the space-to-passenger ratios first...then, it is a matter of ship design and layout...
The Royal Caribbean ships, though large, are quite comfortable...
Celebrity's 91,000 gross ton M-class ships, which I've sailed on several times, are absolutely the roomiest large ships out there...I expect the Eclipse to have the same spacious and comfortable feel...