I am planning on enjoying my first Celebrity cruise so much I hope to book onboard my next Celebrity cruise

I believe I have narrowed it down to the Millenium Class and wonder if you wonderful folks can give me insight on booking one ship over the others. I'm looking at be the Summitt to Bermuda, or perhaps a Southern Carribean on the Constellation or Millenium. But my mind is not made up. I have never done a Bermuda cruise, and would love to. I have been put off Southern Carribean because of the amount of kids from Puerto Rico, I don't dislike Puerto Rico or kids, just the overwhelming amount on the ships I have sailed. Maybe a 10-day plus Southern Itinerary would solve that issue ? Thank you in advance for your input.