Originally Posted by The Joker
Keaton had a couple of moments that showed he didn't want to be Batman either, it's just Bale's is more fleshed out and explored.
I'm not sure about fleshed out. Keaton looked pretty convincing when explaining to both Vicky and Selina his situation. Now Nolan is an expert explaining in full detail Batman's motivations, even when that could mnean to get a little repetitive.