Many people get sea sickness-- and as suggested before, Dramamine is really beneficial + a lot of us are "partying!" which would add to the queezyness!
P.S. Norovirus sucks! I got it from my last cruise-- The Vision of the Seas. I got back January 6th, on Jan. 7 (my birthday) I woke up at 4am running to the BR to throw-up. ugh-- it sucks!
Royal Caribbean- Vision of the Seas- Dec. 31, 2006 - January 7, 2007
Carnival Pride- Dec. 18-25, 2005
Celebrity Summit- Summer 2004
And Many more that can't remember off the top of my head!
Cruise Lines I Have Been On
Carnival (many times)
Royal Caribbean (many times)
University of Arizona '12!