Make mine Marvel true believers. I find the characters of the marvel universe so much more relateable.(Cap, the hulk, Thor, Wolverine, Collusus are all chaarcters I strongly relate to for different reasons.) Marvel takes a character and super imposes some sort of flaw or idea on to their powers. It becomes the governing mechanic that means them go. The setting might be fantastic, but generally the characters in the marvel universe react and deal with each other like real people do more often than not.
DC, characters just kind of exist. Superman just is better than everyone at everything, and never given any compelling character development to why he is. There's never been any true hero's journey for him. He is entirely too powerful, and his powers are innately part of him to even allow for it. He's often a marty stu/mary sue as a result. You can't really say why he is who he is, besides well his parents just did that awesome of job...Okay sure. Say Marvel's resident paladin character, Captain America is someone who follows a very simliar mind set, but you can see how he got there. He had to earn his stripes, was bullied for years. He's seen what happens when good men do nothing. Superman is too far removed from humanity to truly ever grasp our plights to get who and what we are. He just has super humality because he does. He's basically space jesus, and is not a very compelling character because of it.
Wonder Woman is sent by the gods to defend us. Again her character really has no motivation beyond doing good because I was told to. Take the character who's of simliar origins to her, descendent of the gods sent to earth, Thor, you can understand why he is who he is, and why he wants to protect the world. (For one, like many marvel characters is a bit of a mama's boy, and the spirit of Earth Gaea is his mother heh. Don't mess with his mama.)He is an arrogant ass at times, and doesn't always feel like listening to laws of man. His father has made it a point to teach him humility many times because great power does require great responsility. I can relate to Thor because I have had my father pit me against my fathers in a simliar fashion odin does to Thor with his rival characters(Hercules, Beta Ray Bill.) then foten meddles with the results.
DC has characters I like, and enjoy, but marvel will always be my favorite.