man you are going to get a million different opinions on this one, everyone likes a ship for several different reasons, I would say, that if you are attempting to avoid children, make sure you are not cruising around school vacation time, we were on Victory in April on school vacation, yes there were kids on the ship but I must say they were better behaved than some of the adults,,{ ) Enjoy
There is no "best" ship. That is too subjective. Carnival's cruise product is the same regardless of the ship. I like the Holiday (oldest smallest ship) as well as the Spirit-class ships (much newer and larger), but for different reasons.
Carnival caters to families, so looking for a Carnival cruise for the over 50 crowd is more a function of timing than anything else. You will encounter more people your age on longer cruises, and on cruises which happen when most schools are in session.
Anything ship from Princess, HAL, perhaps Celebrity, or Regent. And as all have stated, the longer the itinerary, the less families on board.
My one suggestion to is see a Travel Agent that is a cruise specialist. They can answer your question and find the best fit for you. Best wishes and Happy Holidays!
If I'm not ON a ship, then the best ship is either the one I just cruised on, or the one I'm going to cruise on next.
I've seen all age groups on Carnival, at various times of the year. On a Conquest cruise in October (for my anniversary) I doubt the wife and I saw more than a dozen teenagers. On the flip side, in March there are a whole lot of spring-breakers around.
I'd watch the calander, avoid time when school is out (college too). But by all means book a cruise and enjoy yourself!
Out of the three Carnival Cruise ships I have been on, my favorite was the Glory. However, that is just a personal opinion of mine. You can ask anyone else and get a different ship as their favorite.
The Carnival ships that I hear consistantly geting high marks in the reviews are the Miracle and the Legend. But it really is a subjective matter, and opinions will differ. I really don't think that one Carnival ship is significantly better than the other.