Eyes pretty much...I have always been really good at reading them for some reason. I know they aren't part of the face but I notice hands a lot too, I think you can learn a lot about a person from them.
hey on Little Nicky. Kevin Neilan was on that, and he had tits on his head. I notice their eyes, probably because they're the brightest thing on the person in most cases. Or their nose. I'm very particular with noses.
their nose if its um.. "jewish looking" (please dont hate me for saying it that way..) their smile if its my boyfriend. otherwise, i am studying their hair.