Heath Ledger had to deliberately deepen his voice and augment his intonation to fit the role, and I think he did a phenomenal job at portraying it. He brought a lot of the primal elements to the foreground and showed us a world where the human spirit is tried to its limits, and the importance of never giving up. The spirit may be willing, but the body is weak, and it’s believing in ideals that makes them possible. The shadows will fall behind us if we but look up to the sun and live in the light.
Besides it being an action packed, attention getter, thought provoking, special effects spectacle, subplots galore, thriller of a movie… it’s a good movie delving into the psychology of the human condition as well… and the only thing necessary for the triumph of evil is for good men (or women) to do nothing.