We are usually in Retreat and gratuities have always been included. We tip extra at end of cruise if we receive great service. Usually stateroom attendant, butler, waiter and assistant waiter. Sometimes the sommelier if they are very good. Once in a while someone else who has gone above and beyond normal job duties. I always give them a handwritten thank you note with cash. I never give anything at the start of cruise as I consider that a bribe.
Now that gratuities are not included in AI we will still tip those who have been exceptional but I don’t think it will be as much. We will see.