Thank you for the fast replies. I usually over tip, so all got over the suggested amount. Because the headwaiter helped out with my wife's special dietary needs, I couldn't give her the suggested amount ($4.50). She got $50 and was worth every penny of it!
RCCL Explorer of the Seas 2007 Bermuda
NCL Dawn 2008 Bermuda
RCCL Majesty of the Seas 2009 Bahamas