None of the live action Batman movies do him justice, you have to go animated:
The Dark Knight
Returns
Superman/Batman Public Enemies
Batman Assault on Arkham
Superman/Batman Apocalypse
Justice League Doom
Justice League Crisis on Two Earths
Just some of my personal favorites. Many of the animated movies are just okay or don't do Batman justice either, so they're not all good. You have to know what you're looking for.
Batman used to be a kind of true-blue good guy like Superman |
Not sure about that one. Batman has always been prone to "evil" or going to far. His enemies are interesting because they provide a psychological and intellectual battle.
He abides by a moral code to stop him from going to far - because he knows how easy it would be. The joker is always pushing him to break it, to go too far, to step across the line. It's so draining and difficult to fight with rules when the your opponent doesn't.
However, the most "true-blue" version of him you may like is "Superman/Batman Public Enemies" which I've listed, it's a very good movie with a great Batman.
Sadly, his iconic voice by Kevin Conroy is gone forever. RIP.