I am a big Marvel fan. I read things about the DC characters and consider it confusing. I think that is why I stick with Marvel, it's what I know. But every DC comic I ever read I liked.
As far as realism, I don't know. I pick titles that are as far from reality as possible. I consider that they point of reading comics, to escape reality. I don't need to relate (even though they relate on the emotional side most of the time). I want to fantasize.