Regarding Ledger:
He was incredibly intense in his performance but incredibly mellow and laid-back. Certainly there was this great anarchistic streak to it—just getting dirtier than anybody’s envisioned the Joker before. This character has power because he has no limits—absolutely nothing to lose.
You can read the full article HERE.

Twitter
Facebook
[...] Bruce Wilson wrote an interesting post today onHere’s a quick excerptRegarding Ledger:. He was incredibly intense in his performance but incredibly mellow and laid-back. Certainly there was this great anarchistic streak to it—just getting dirtier than anybody’s envisioned the Joker before. … [...]
Christian seems like a nice guy, although it seems to me he doesn’t turn down any parts. But it’s cool he comes up with a new look and accent for each film.