Who has the best rewards system on a cruise line?

I totally forgot about Norwegian Cruise Line! They have Latitudes Rewards  Bronze>Silver>Gold>Platinum and its 1 point per night, but they add points based on if you book a suite, in advanced and from an Insider Offer..... 

My apologies to NCL cruisers! There are so many to remember!!

I like RCCL the best , I am a Diamond Member , they take good care of me

No way I can contribute to all of this.  Way to much.  I only have cruised Carnival and can only go one time a year.  Maybe more once I pay of the car.  Not to much left on that.  I will be a lowly gold card with Carnival for awhile.  I need I think 7 more cruises to reach Platinum.  So that will be awhile.

Princess has been super for me mainly because they count number of cruises and days.  The free internet and priority check-in are the perks I like the most.  

NCL also adds 1 point per night if you book more than a year in advance. Sort of a nice perk for the long planners

We are about 3 cruises away from Carnival Platinum after our January 2017 and October 2017 cruises. We cruise for ourselves rather than the perks for the VIFP program. I just like knowing how many days we've sailed 

I like RCI the best.   The advantage of RCI is your level transfers to all of its lines,   So if you start on RCCl when your younger and you hit Diamond,  when your older you can go to Celebrity and get the same level of benefits,  When you treat yourself to Azamara you will get the same benefits.  They do not combine points from all lines but they do transfer your highest level.  My Diamond Level on RCCL gets me Elite level on Celebrity (that I would have almost earned by the # of Celebrity days I have cruised)

I do remember this, but it was too much to add in the post, but I do like that as well. I enjoy RCI, but looking at Celebrity, so when I do (because I'll be platinum after September) I will have similar perks!

NCL gives double points if you book 9 months or more out.   We are Platinum with them.  

Carnival changed their point system several times.  At one time, they counted cruises, not nights. So a three day cruise counted the same as a 10 day cruise, which is ridiculous. So now they count nights.

Carnival does however, at their discretion, change your status during a cruise.  With Norwegian, if you are due a change of status, it doesn't go into effect til your next voyage.  We almost lost out because we had booked a 10 day trip instead of a B2B.  We would have become Platinum on the third day of the 10 day trip, but not received the perks.  On the B2B, we would receive the perks on the second leg.   It was all moot because we booked a last minute 10 day getaway which put us into Platinum status.  Then we cancelled the other trip anyway.