I'm listening to old, podcast from the two headed nerds and a caller, Carl Smith, (the person who sparked this question) said; "Batman is defined by his villains".
I agree with this to a point. When Batman's villains go dark, Bruce has to control and contain his angry. Moments when the joker tries to kill the entire bat-family.
Especially considering what happens to Jason Todd, because of the Joker. I just didn't like this Joker, story and in relation towards, what makes BATMAN, Batman. This representation of the Joker kinda sorta tarnished the idea of Batman. I didn't like it.
I guess the Joker changed Batman in a way I didn't care for.