I'm book on Imagination sailing on march 22nd with my mom so I hope there aren't too many loud obnoxious 20-somethings on board. I want to relax. But I expect there is always a mix of all demographics on any ship at any time. So, I will just enjoy it no matter what. I have my ipod to drown out any noisy folks and hope they will avoid the Serenity area. And I always keep earplugs with me as I easily get a headache if it's too noisy.