We have seen a number of super-hero movies that explore the darker aspects of being a super-hero (Spider-man, Ghost Rider, Hulk) but this one does it best. You can really see Batman teeter on the edge when he is trying desperately to stop the Joker.
This is a much darker and less "fun" version than the original Batman with Keaton and Nicholson. Ledger's joker is different having a much darker and sinister edge.
It is a long movie that is for sure. It doesn't drag but I found that I almost needed a break from the high drama of the Joker plot. I almost wish they had setup the movie to require a sequel to complete it, so they could spend more time exploring the other characters in the movie. But all in all a good flick.
I have no idea why people liked this movie so much. It was bad, and not campy bad. Just bad.
Mild spoilers ahead. Bad dialogue, no good one-liners like in Raiders or Crusade. Story was dull and uninspired. I could care less about what they were searching for. Characters were also quite boring and added no interest for me.
Aliens?! Aliens are not appropriate to Indiana Jones, pulp 1950's style maybe, but not Indiana Jones.
One of things that I liked about the other movies is that they had enough archaeological pseudo-facts it made the quests believable. They spent very little time on the actual archaeological reasoning behind what they were searching for.