i personally think Batman would win in a fight and is more interesting.
Batman always has kryptonite on his belt not to mention he has contingencies in place for just about any situation. He also has the brains, which usually beat brawn. superman is not dumb but batman is definitely the greater strategist. as for being the most interesting, i just enjoy reading and hearing about batman more. his dark past and the psychological things involved with his story make for a very interesting read and movie. i also love the dynamic he has with his villains. for instance two face was one of his best friends until the accident that sent dent (see what i did there ) spiraling into insanity. his love interest in the form of cat woman leads to interesting and funny moments as well. his relationship with the joker is also interesting. they are "two sides of the same coin" in a sense. they understand each other better than anyone else the way i see it. batman even morns jokers death when he dies. i amm not saying i dont find superman interesting, its just that hes practically invincible and he does not have as interesting of a back story nor as great dynamics with his villains and allies in my opinion.

Seeing as how I can't vote for some reason, I'd vote Superman would win, but Batman is more interesting. Meh. I've never been a huge fan of either. They just didn't interest me. But oh well. Yeah. :3