Burton and keaton captured the look and feel of batman, even the score is instantly recognisable. Keaton acted the shit out of the rest with his expression and mannerisms alone.
I wonder what burton could have done with todays effects and a bigger budget as that's where his films fall short, the sets at times looked fake and they were a bit light in action, especially the first.
Nolans films don't have a batman feel, just action films with the main character in a rubber suit and a silly voice.
Ironically the best stuff from nolans films are of bruce wayne training to become batman.
A couple of years ago they wanted to adapt the dark knight returns with keaton reinstated and burton back on board, what a missed opportunity.