[Spoilers!] Dark Knight

[Yamu]

You are very hung up on the lack of characterization. I understand you do not like that the Joker was not developed but he was not supposed to be.

He is a self admitted agent of Chaos. He has no motivation beyond bringing Gotham into his own dark void. There is no characterization for the Joker because that would ruin is aura of mystery. Alfred when he talks to Bruce talks about how hard it is impossible to fight a man with no motivation beyond watching the world burn. The thing you dislike is a major plot point for the movie and how it deals with the battle for the soul of Gotham between the conflicted Batman and the absolute Joker.

If the Joker WANTED something tangible like wealth or sex it would have been a completely different, and worse, movie.

Aero: They are using the same gun that Happy and Dopey, the bank robbers, use at the begging the tow hooks with the steel cables attached that used to zip line on at the begging. The steel cord gets caught in the rotor and and stops it spinning forcing the cab itself to rotate wildly.