I cruise on Carnival mostly and do all my check in's in advance, print all my docs and have them in hand when I get there.
I have a coworker that was boarding a Royal Caribbean ship today. He only filled out the health documents for himself, didn't complete anything else. And there were three others in his room with no docs at all completed. Didn't print anything, not even luggage tags. I tired to help but he wouldn't listen. I feel sorry for the people in line behind him.