Hard disagree on that, I find "Bruce" is one of the least interesting part of the Bat-mythos.
I definitely see why you wouldn't be so keen on Keaton.
Keaton played Bruce as Batman pretending to be a normal person, whereas Bale/West played Bruce in a cape.
Pattinson has the opportunity to show both as interesting characters, as he almost introduces/discovers Bruce as he changes through the film. Hopefully it goes in an interesting direction with the next movie.