As a 200cm/6'6" man, I think the optimum height is 6'4" - you get all the benefits of being tall (social prestige, being able to breathe in crowds) and fewer of the disadvantages (clothes still fit, beds still fit, buses and planes still fit, don't hit your head on doorframes or light fittings anywhere near as much).

If only I could go back in time and tell young vacri to stop growing at 6'4" :)