Nolan's films take everything dead seriously. If there's humour, it's probably from the Joker and is in shockingly poor taste. Yet I thought he was a lot funnier than Nicholson's Joker, ironically enough.
Way funnier. But I have to argue the idea that there's no humor in Nolan's bat-films. Bruce Wayne in these movies actually has a sense of humor ("You know how it is, Mr. Fox, you're out at night looking for kicks, someone's passing around the weaponized hallucinogens..."), which is a rare and wonderful thing. Very, VERY few people have been able to produce a Bruce Wayne who can be warm and funny, as well as obsessive and scary. Alfred and Lucius drop quite a few funny lines - the humor is all within the world though, not the self-conscious humor of Burton that tends to wink at the camera a lot - oh look how outrageous and absurd this world is. I'm not knocking that, Edward Scissorhands and Ed Wood are two of my favorite funny films.