Can everyone please stop attacking Nicholson's Joker just because there's a new Joker in town? I know that Nicholson gets this reputation for "Jack playing Jack", but anyone who's ever picked up a Batman comic with the Joker in it in the past decade or so and has seen Nicholson's performance should see that he was pretty dead on: a psychotic, sadistic, egotistical mass murderer with a flair for the theatrical. Will the late Heath Ledger's performance in The Dark Knight surpass this? Maybe. Probably. I have a feeling that The Dark Knight is going to be the best Batman movie ever made, even better than the animated Mask of the Phantasm. Still, let's not deny how good Burton's original Batman movie was, and it's not just out of nostalgia. It was a great movie. Not perfect, but great. I like it more than Begins, even, if just a little.
Anyway, here's a comparison: