Hi Imateez,welcome to Cruise-Chat! You can't go wrong with any of the lines you have mentioned. I'm partial to Princess, but they're all good lines. I find on most of the Princess cruises I've been on the median age is around 40. They also seem to have fewer children. However, before everyone starts throwing things at me, all the cruise lines you mention are very good. Please let us know what you end up selecting
