I have never tipped for breakfast service. Room service at night or unusual times I do. Breakfast in the room I consider to be part of the tips provided at the end of the trip.
I have noticed the service level has dropped since they went to the automatic tipping system where the gratuity is added to your bill at the end of the trip.
I feel that this system created a consistant pay check for the Room attendants. It is my guess that there are few guests going to the pursers desk to adjust the tip amount below the suggested amount charged.
19 cruises total on all different lines including RCCL, NCL, Celebrity, Princess, Holland America and Sea Dream. Our 20th Cruise is October 2007 on the Mariner of the Seas.