I agree. The Dark Knight has some of the worst pacing of any major movie I've seen. I think only Rocky is worse as far as popular/award-winning/etc goes (or at least that was so bad that its my biggest issue with it). I personally think Ledger's acting in it is very overrated as well. I think people are just letting the makeup fool them a lot; that and a lot of people apparently didn't know he could act (he was better in Brokeback Mountain). I don't even think it was a good Joker. To me, Joker is more like the recent Batman games and the animated Batman movies.
The Burton Batman movies are really odd for me. On the one hand, there is some good quality to them, but on the other, there's just something off. For the time, especially the first, was pretty good. I don't think they held up well though.
Batman Forever tried to go for more camp and a comic feel which is why the characters overdo it. I don't hate it, but its not a great movie. Parts of it are pretty baffling, like the noir/golden age (1910s/20s/30s) look it tried to go for only to have that stupid futuristic Batmobile, the "Box", or the EL/blacklight when Robin took out the Batmobile. I think it really highlighted what was wrong with the Burton films as well. They do some interesting noir type of stuff, but then screw it up with the things here and there (and cross the line with cheese too much).
Begins did a good job as it focused on making things seem modern and make the world seem more coherent. Its not a perfect movie, but it was solid. The Dark Knight has great scenes, but some of it should not have been in the movie (like the whole scene with the ferries; that actually would have been great as the basis for an entire other movie though), and the rest feels too stitched together and kinda wonky.