I have a few things I dislike about DC, but the main one is the fans. In my (possibly biased) experience, DC characters have the biggest flcok of pigheaded, logic-ignoring and childish fans out there. I go to a few message boards like the Versus forum, and any time a DC character is brought in, there is always this ration of people who run in yelling that the DC character will win and ignoring all comments to the contrary.
Now, that's not to say that Marvel doesn't suffer from this as well. There are quite a few Hulk fanboys that are so stubborn and dense it's sickening (only one or two on here, as opposed to several on other boards). And then there are the Wolverine fanboys... ugh. Still, while a few Marvel characters do suffer from the Rabid Fanboy Syndrome, it seems DC fanboys refuse to allow for the possibility that ANY DC character would lose in a fight against a comparable Marvel character.
Another thing is the powerlevels. Marvel may take the cake in high end cosmic beings (though that is VERY debateable), DC is waaaay over the top int he every day readable characters. Everyone and their brother is a Class 100, invulnerable, speedblitzing brick on some boards. Wonder Woman goes from having to use her bracelets to deflect bullets to a Superman-level lifter who was also an unbeatable martial artist with a device that gives her a ehalingf actor that rivals the Hulk's. And then there's the Flash. First, he just ran really fast, then he vibrated through sh*t, then he hit light speed, now he's a speed-stealing, time traveling, infinite-mass-punching, uber-speedblitzing God Of Speed.
And then there is Supermand. My God. Why read a Superman comic when the odds are its just going to end with the hero either a) getting a new power b) losing (or greatly reducing) one of his vulnerabilites c) casting off a mental blocks/sun dipping? I mean, honestly, pick a f*cking powerset and stick to it. Come on. Super-ventriloquism? SOUL VISION?? In all honesty: what the f*ck (oh, and just to clarify, those are both recent powers displayed, not Pre-Crisis).
And you know, his power level isn't really my problem. I mean, one of my favorite characters is Majestic, who rearranges solar system's to solve a dilemna. My problem is the bloody worship.
Superman spends every day of his life, every minute of his day in a constant parade, both in and out of comics, telling him how great he is. He goes to the JLA, everyone tells him (or thinks about) how great he is. He goes to work at the Planet, that whole paper is devoted to NOTHING but talking about how great he is. His own job AT the paper is making reports on how great he is or what awesome thing he just did, and there are characters that were designed largely just around showing how great he is (Superboy and Jimmy Olsen for starters). Same goes for a lot of the DC heroes, heck there's a Flash MUSEUM for crying out loud.
Frankly I think writers spend more time trying to think up ways of telling him how great he is than actual dialogue on anything else. Thor's a -GOD- and he doesn't spend half his time getting the worship Superman does, even though he's just about as powerful, just as heroic, and saves lives as selflessly as Superman does. I just get sick of seeing Superman's knob getting constantly stroked.
And the funny thing is, after all is said and done, I can generally sit down and read a DC story without shuddering. There are some decent ones out there, and some Vertigo titles are nothing short of amazing. I just hate the -quite literal- hero worship granted to the handful of big names by writers and fans alike.