Could he have done better, maybe, did his voice get more annoying as the trilogy progressed, definitely.
Regardless I think he did a great job playing a billionaire vigilante. And did find most of his acting spot on for the Batman role.
Also, Morgan Freeman as Lucius Fox was perfect.
I don't think Morgan Freeman was a good choice for Lucius Fox..
Morgan Freeman is more famous than Lucius Fox..
in the MOVIE, the scenario was more along the lines of Lucius Fox became Morgan Freeman, rather than Morgan Freeman became Lucius Fox..
This is with respect to the story, the movie itself is fine.. but it did break the original character..
SAME with batman... BATMAN is supposed to be the PEAK of human conditioning and physiology... Christian bale looks more like a junky who has successfully completely rehab... good for him... works ok for people who don't really care about details...
But... again... Very UNLIKE the specifications set forth by the comic book.