I liked Bale's voice in TDK. When he was talking normally it was ok. When he was trying to act hurt or whatever it was really bad.
When the joker had pinned him down, he had throat cancer.
When he said Dent's quote (die a hero...) it was like he had run a marathon.
etc....
Yeah i know he was hurt and all, but it could have been better. I liked his voice on every other occasion, even more than BB. For example when he asks Gordon to let him go first in the building, all his (few) lines when he captured Scarecrow...
As for "good", i think you should undestand that he is talking in his batman voice. He is being a bit theatrical. Its only natural. I found it ok. Actually, the only line he elongated too much was the "doooo" line in begins.