I feel the same, and that was a testament to Heath's work & Nolan understanding the character. In B'89 I liked the Joker a little too much, he was funny, but almost never sinister enough for me to actually want to see him go.
But when Batman emerged in the interrogation room, I was excited! I wanted him to break that creep in half, and that's how it should be. This is the reason I was opposed to the permawhite thing (sorry for bringing it up folks) but if he was like that, in Nolan's hyper-realism world, it would need a real explanation, not one of the Joker's made up stories, because it would be almost supernatural. The fact that he's just a normal man who chooses to make himself up like a clown, and goes around killing people with no motive whatsoever, It made me feel zero sympathy. It was a love to hate type of thing, everytime he was on screen I was excited to see what was next, but it wasn't a feeling of love towards him. I very much wanted Batman to beat him up.......bad