I can't personally speak to the quality of other cruise lines, I just went on my first cruise this year and it was with Disney. My dad has been on too many Carnival cruises, followed up with numerous Royal Caribbean cruises, and his NCL count is starting to get up there now too. He joined me on my first cruise this year, which also happened to be his first DCL cruise. He said, he personally felt it was his best cruise he has ever been on and noticed a difference in the quality of the ship and its cleanliness (We were on the Dream), food, customer service, and entertainment. With this being our first DCL cruise, I don't think there is a Stockholm syndrome but to each his/her own.