This poll surprises me, IMHO imperialistic is an OK trait, but you really have to MM to make sure your pop 'n chops go towards settlers. Protective is either the worst trait by a little or the worst trait by far depending on the leader - if you have a UU synergy (Churchill, Mao, Qin, Saladin) or have an XP bonus that helps you get up the Drill line faster (Churchill/Charismatic, Sitting Bull/Totem Pole) it isn't terrible, but otherwise (Charlemagne, Gilgamesh, Tokugawa, Wang) its pretty well useless.