I hate it when people give me false smiles, when the pretend to be polite. Especially the management-type people. Don’t know why, but it always creeps me out.
Forcing oneself to behave pleasantly makes it even more unpleasant on the others. I would rather spend a day with a sullen old curmudgeon then a hour with some one who forces himself to be up-beat.
I don’t have anything against people who are genuinely up-beat. I love ’em. They’re energising to be with. But please, don’t force it.