DC
Likes:
The writing is generally better than marvel's, same with the art imo...
Superman (too many reasons to list)
They seem to do the big events better...
The subtlety... guys like the punisher and wolverine in marvel are so in your face 'oh look at me, i'm such an anti hero, i save people's lives but have no problems crippling villains to do it', but in dc, when a good character shows that bit of darkness, to me its more believable, and a hell of alot scarier... superman, wonder woman... knowing that they're capable of acts that evil, i think thats something incredibly human...
The whole concept of the Green Lantern, pure genius...
Thats it for now...
Dislikes:
Devaluing all the good about superman by making him do insane shit, thereby making his already impressive (and genuinely feasible) feats look tainted...
Getting rid of wally... what. the. hell.
That Lois Lane is a self obsessed cow. (sorry, but women like that just get under my skin)
That Selena and Bruce haven't just shacked up yet... for chrissakes, just marry each other already!
Marvel
Likes:
The X-Men... considering it was made in the 60s, it was incredibly ahead of his time...
Cyclops... pretty much the only character i can actually completely identify with...
Stan Lee and Jack Kirby, the guys are legends...
Silver Surfer, if you don't know why, then shame on you...
The Ultimates
Dislikes:
The sheer commercialism... they are ruining marvel as a whole by looking more at the money side of things than the actual comics and the characters themselves...
The constant shifting of the x-teams...
Overrated writers and artists...
The sheer amount of crap i hear from marvel fanboys, the writers are to blame as much as anything...
Chris Claremont, i know he's a writer, but god, the man deserves a swift kicking... a very long lasting swift kicking...
The events... no matter how much they try, they just cant seem to do em properly... at least imo...
That's all for now i guess...