Loved everything about his Batman. He was edgy, threatening, cold, cunning etc. What I loved about Bale's Batman in the Nolan trilogy is we got a little bit of everything (for the most part) from the comics, especially the modern graphic novels. Obviously some things more or less. I hold his performances in BB and especially TDK in a slightly higher regard than TDKR, but that's mostly because we don't get to see much of him in the suit. But still, when he's on screen in full Batman mode in TDKR he continues to nail it. Shame the film had a little too much going on for its own good. Even though Bruce is not in his prime in the film; if we had a few more scenes like ones where Batman is giving out orders like his scenes with Blake freeing the cops, giving Selina the bat-pod, the "light it up scene" and his initial return scene, I think the film would have benefited from it. Especially when you consider just how aware and up to par he was in the previous films. I understand the whole "out of the game" premise, but seeing a few more scenes like the ones mentioned above would have made Bruce's struggle and ultimate victory over Bane that more satisfying.
As for the voice, I've always loved it, lol. The only time I felt it was too much was during his last scene with the Joker. Where's the trigger was mostly due to him asking for it one too many times, plus "You'd never give it to an ordinary citizen" is just a bad line altogether. Besides that, I'm one of the few who actually champions the voice.