Just got back, absolutely fantastic flick. Pheonix in unbelievable in the role, and it had me thinking that all the good performances of that character, seems that the character itself is such an inspiration to actors. (Hammill, Ledger, Nicholson, Pheonix)
I would say the biggest effect it had on me was not just how dark it was, but how uncomfortable I felt through most of the movie. How the self conciousness of the character brought out my own insecurities. I think that's about as high of praise an actor can get tbh.
Spoilerish stuff....
Powerfully impactful on the mental health front, especially with the shutdown of the clinic and how losing his access to the meds played into his downward spiral, and how said mental health is viewed in all the wrong lights. They did a fantastic job of handling it. I didn't have an issue with them knocking off the Wayne's, and agree that the flashback with Domino was unnecessary. It's unfortunate that it will be a one off, cause they really handled it so, so well, but with how old Bruce is, Joker would be 60 by the time he was old enough to be Batman.