We regard the recommended tips as a service charge & just pay it because we are expected to. I don't begrudge the staff the tips but I don't really understand it either..seems an archaic system to me, in this day & age the staff should be paid a proper wage & that's it for me. I have never really had any service from anyone beyond that of doing their jobs, we seldom ask for anything special either, nor do we see the room steward that often. The dining team take our order & bring the food. It a difference in culture between the US & the rest of the world I think. When I told one confirmed P&O regular that Celebrity charged our account $US 24 a day +15% on all drinks HE WAS HORRIFIED!!