Call button - do use it if you want something. They will come with a smile.
Last year I had a flight where I dined at my chosen time, ie when no one else was dining. I received my starter and wine. Five + minutes after my plate and my glass were empty there was no sign of the FA. Eventually I had to use the call button. Same after the main course. She was quite inattentive so the call button was necessary. Not my idea of good service, but at least they come when you call them.