I remember Keaton saying he was retired a few years ago because he didn't want to do bad films and he didn't like any of the scripts being passed around. He decided to spend more time with his daughter. That shows what kind of a person he is, and his values as an actor. He's not just in it for the paycheck, he doesn't want to do horrible films - thats why he turned down Batman Forever.
I'm glad he's back now and directing his own project because he's a fabulous actor ... I mean talk about range. From Beetlejuice to Multiplicity to Batman and Desperate Measures... wow.
As for comparing BB and B89 -- I enjoy both for what they are. From a "modern fan of film" point of you, you could definitely say that BB was "smoother" and "more realistic." However, from my amateur-film-maker point of view, I admire what Burton did far more because I know the back story. Like Keaton mentioned, you guys don't know how hard it was to make that film ... they had no budget, and no support, and everyone thought it would tank. Burton was a big nobody at the time, unlike Nolan who was prince of the hype coming from Memento and Hollywood just couldn't wait to use his for some big-budget thing. No one understood why the hell Burton wanted to make Batman "dark" "all of a sudden" ... they were thinking of the TV show only. Nolan is just stepping up a notch on what Burton had already begun, after *****maker ruined it.
The fact that ANY of B89 it is relevant and plays today is amazing. Sure it looks like it's on a set... because unlike Nolan they couldn't CGI a cityscape, and sure Batman looks silly with wings that have springs ... because unlike Nolan they couldn't CGI a cool bat-cape ... Nolan had 160 million and 300 cgi shots and Burton had d**k-all to make that film with.
So that's why I admire what he did, from that perspective GREATLY.
Peace.