Okay, differences between Nolan's batman vs comic batman:
1) Batman is suppose to be traumatized/haunted by the death of his parents. So much so that he has become obsessed with fighting crime. He's dark and twisted in his own right, hence the name "the dark knight". He could never "quit" the way Nolan's batman wants to quit. The idea that batman could go and have a normal life someday is completely against the character. Yet Nolan's batman spends half the movie wishing he could get with Maggie Gylehall and let Dent keep the city safe which is ing stupid.
2) Batman is suppose to be cynical. He doesnt even trust Superman (keeps his own supply of kryptonite...just in case). He has his own dark side and thus believes everyone has a dark side. But we're suppose to believe he's gonna let a politician "be the new hero"?!!
3) Batman is suppose to be a cunning/clever master sleuth. Part of not having super powers means having to outsmart his opponents who are usually evil geniuses in their own right. Likewise, he usually has to spend time trying to determine the true motives of his adversaries by gathering clues from various crimes etc. The Joker is his arch-nemesis because he has no motives. He simply loves chaos. This may have touched on briefly in "TDK", except its Michael Caine who realizes that Joker doesnt want anything except anarchy, not Batman. He has to be TOLD by his "wiser, older butler" which turns batman into a "dumb Tony Stark".
Likewise, Batman is outsmarted by the Joker in the entire film. He lets himself get captured, escapes from jail, kills batman's girlfriend, turns Dent into a bad guy etc. If "Deebo" from Friday blows up the other Ferry full of civilians (which would have happened in real life), the Joker would have been successful at pretty much everything because hes so much more ing clever than "Batman".
Dont even get me started on that ridiculous raspy voice. Did someone tell Nolan that Batman would make awesome parody material if you gave him a comically stupid voice? Instead of sticking to known character traits, lets give him a stupid voice! Let make him as un-cool as we possibly can!
So yeah, Im not a fan of Nolan and Im bewildered by "Nolanites".
There STILL has yet to be a definitive Batman the way Christopher Reeve was the definitive Superman. They could have cast someone complete different for "The dark knight rises" and it wouldnt matter because theres NOTHING memorable from Christian Bale's portrayal of Wayne/Batman.
Imagine recasting Iron Man with someone besides Robert Downey Junior. You cant because his persona and quirks helped define the character.
Nolans films focus more on plot than characters.