Saw it again today. I noticed a lot of things that I didn't the first time, including a few errors: When Two Face hangs up with Jim Gordon on a cell phone, why is there a dial tone? When the Joker sets off the bomb in the guy's stomach in the police station, why is he the only one left uninjured? In fact, he's not even shaken at all by th explosion; he's still standing, immoved.
However, I was able to better understand certain aspects of the movie, like the part where the Joker dresses up the hostages as clowns, and the clowns as hostages. The first time I was confused as to why he was fighting the FBI.
The movie is great and I recomend everyone see it at least once, if not twice or more.