I've always been a Marvel Zombie. My first super-hero comic was Fantastic Four
233, "Mission for a Dead Man" by John Byrne and from there, I quickly discovered the rest of the Marvel U.
I got into DC briefly right around the time Byrne started his Superman run (I was buying an occasional Batman before that) through the end of the Giffen/DeMatties Justice League
, but lost interest in DC after that.