The age groups and personalities of guests on cruise ships will differ on different cruise lines and different ships. Some cruise lines like Royal Caribbean will cater to families with kids. Likewise, Celebrity while there will be some kids, will be more conducive for adults. Also, the amenities, activities and kids programs will also influence the type of passengers on a particular ship. I would strongly advise you to consult with a knowledgeable cruise consultant before booking a cruise during holiday time.