There's been a somewhat understandable backlash against the Nolan films recently. Some of this has to do with the fact that they just aren't perfect films. I generally agree with the criticisms that Nolan is a sloppy shooter (here's a really good essay on Nolan's style), and that the dialogue in his films is kinda lame ("It's not who we are underneath, but what we do, that defines us"); a lot of times, characters will just come out and say what ideology they stand for, which, in addition to being clunky, violates the time-honored rule of "show, don't tell."
Still, I like the thematic ambition of his work, even with it being as heavy-handed as it is. He's not doing gritty and serious because he thinks it's cool; he's doing it because he has a take on the world and thinks that the darker style is the best way to get it across. Incidentally, this is what Nolan's emulators don't get about the Dark Knight trilogy, which leads to the other reason for the backlash: The legion of inferior imitators (see Snyder, Zack).
I like Burton's Batman well enough, but would caution against too much nostalgia--the film has flaws aplenty, from Batman being sidelined for much of his own movie to the dead-on-arrival romance between Wayne and Vicki Vale to Joker's shooting down the Batplane with a three foot long revolver. Even by the standards of heightened comic book reality, some elements of the film have not aged well.