I really find that The Dark Knight is his most emotional. You got Bruce's struggle with wanting a normal life and being Batman,Harvey and his love for Rachael,which in losing her,drives him mad,and of course Gordon,who is willing to fake his own death for the city he loves,and his emotional scene where he almost looses his son. Not only that,but the Joker plan is so horrific,that the absolute worst comes out in people,but they are not acting out of pure evil,they are acting out of fear,which makes them far more symphetic. To me,it is just so emotionally powerful,and still,his best film to date. I agree with I was reading on here,though.All his films are emotional.Never understood people who say his films are "cold." They are very emotional,while being very intellectual. Difficult balance,but he pulls it off in style.