Strictly a matter of personal preference.
Mine is flat white on the ceiling.
I work in a building where budget was tight so they painted the ceiling the same color as the walls to save labor cost on cutting in the ceiling/walls.
I painted the ceilings flat white and everyone loves them (maybe just because it's different and they were tired of seeing the same thing everyday) and it makes the room look bigger.
Paint is not permanent, go for it and decide afterwards.