My husband and I went on our first Celebrity cruise this past January.
We came home and I have booked two cruises on Carnival.
For the things we enjoy, Carnival wins hands down.
We are in our 60's and decided to try Celebrity because it was supposed to be "better."
We found ourselves wishing we were on Carnival so we could go to the comedy club, piano bar, etc etc. Celebrity was too sedate for us. We like action and activity. The Celebrity shows beat Carnival hands down. Other than that, Carnival is just more fun.