Originally Posted by Anno_Domini
Sorry, but I still don't count having this fascination of killing being the same as showing emotion. You may, but I don't.
You're missing the point. As The Joker said, Heath's Joker displays anger, frustration, joy and a weird form of love for Batman. Those are emotions. Whether they are related to killing or not, they are emotional responses. They are not something you can say doesn't count, regardless of whether you like them or not, those are emotions displayed by the character.