I've been on Celebrity, Carnival and HAL. I think you are more likely to run into first time cruisers on Carnival - I don't know why TA's seem to push the inexperienced cruiser toward Carnival - at least that's what happened to us. If you take age and expectations into consideration, you should be able to find the right cruise for yourself. We loved the Celebrity experience - excellent service, food and accomodations - and have met wonderful people on Celebrity - some younger than us (50's). I don't think you're likely to see any brawls on HAL - we found a mostly senior group of very genteel, experienced travelers who were delightful to converse with. I may cruise again on Carnival, although I don't care for the constant announcements on their PA system. I say, try all the cruise lines! Happy cruising!