Cruise to Western Caribbean 2005

Hey, I'm going a cruise to the Western Caribbean in March of 2005, and I've been once before this past summer and i was 16, i hung out at the Teen Center and everything and it was a blast!!

I was wondering if there are normally a lot of People, around 18, on during March... and what would there be for me to do since I will be 18 when i go... Will it be easy for me to meet people my age?

Oh yeah Any suggestions as to whether i should take the Voyager(Royal Caribbean ship), Star Princess or Caribbean Princess?

Thanks!!

~Justine~