For me personally the biggest challenge for any Bat movie transitioning from comic to big screen, is casting/playing the role of Bruce Wayne (BW.) You can change the costume an infinite number of times, tweak the Bat mobile and the Bat cave, his tech gadgets etc. but if BW is not up to par or credible; this is not good and where it falls apart.
Two specific examples on the big screen where BW is flawlessly played is Batman Begins when we see BW wandering to the ends of the planet, ultimately to train with the LOS and in DKR when BW ditches the rope to escape Bane's underground pit. Michael Keaton also pleasantly surprised a bunch of folks with his portrayal of BW.
Ultimately we all have different story lines, eras, and villains that we read and personally prefer which could influence our movie experience as well. I will keep an open mind on this one.