The problem with fanboys of anything that's lasted decades with a myriad of interpretations (Batman, Bond, Doctor Who etc) as I've noted before in another post on the Batman forum is the 'era' they liked the most is how, in their minds, it should always be and as a result you get the unfortunate impression that many of these 'fans' don't actually appreciate the fact that these characters survive(d) because they're so chameleonic.
Characters like Batman aren't made any better,complex, interesting or durable by sticking to the same damn template over and over again.
Another arrogant assumption is the 'movies should be faithful to the comics 100%' argument. The Batcave was introduced in the first 1940s movie serial, not the comics. The first time Bruce scolds Dick is in that same serial. Heck in Superman's case he first flew in the Fleischer cartoons not the comics. Not to mention, getting back to Batman, the contribution Timm/Dini's show made to the comic continuity (Harley Quinn) a show that, partially, started as a spinoff from the Burton movies (they wouldn't have used Elfman's theme initially otherwise) that many of the hardcore say over and over again they hate.
In other words people have their preferences, I respect that, but they should think about the many versions of the character that have existed within the comics before they whinge about the different version(s) onscreen.