I was disappointed in all the Batman movies. In my opinion, each one missed their mark when it came to telling the story behind this caped crusader. Then again, I always feel the movie version of anything is never quite as good as the books.
In all honesty, I think Jim Carey would have made an excellent Joker. Okay, so he was the Riddler, but I think Jim Carey would have done the Joker role extremely well. As mentioned, someone thinner than Jack Nicholson and more diabolical looking would have been the better ticket.
Remember Mask? Can you imagine if someone like Jim Carey played the Joker? Oh, that would have been something.
A character like the Joker should have been played by someone who could pull off that rubber-faced look. Of all the comics I've read where Joker has been part of the storyline, I kept visualizing this crazed maniac as someone with multiple faces upon each new mood or scheme.
If not Jim Carey, then my next pick would be James Woods. Okay, he doesn't do the rubber-faced look like Jim does, but have you seen how diabolical this guy can look? This is someone who is capable of pulling off multiple personalities, which I believe is what sums up the Joker. Also, James' physique would have matched Joker's. This guy would have made an awesome Joker if he was given the chance.