Sure, it is a marketing ploy but Carnival Corporation & plc have posted a new tool where you answer some questions and it suggests which of the Carnival cruise brands is the best fit for your tastes. Read more HERE
I took it, using cruises to Australia and the South Pacific as my choice. I had two recommended lines - Princess and Holland America.
I posted this here in General since it covers several cruise lines, which all happen to be owned by Carnival Corporation.