My favorite period was pre-Crisis from the late 70's through "Whatever Happened To The Man Of Tomorrow?"

I liked when you could easily follow Supes in ACTION and/or SUPERMAN and you didn't have to buy both to follow any long story. Sometimes the spinner racks would not have one or the other, and that was OK.

Although Byrne is one of my all-time favorite artists, I never liked his re-invention of Krypton and Lex Luthor...still don't. My favorite thing about the Byrne era was his choice to use ACTION as a Superman team-up book, which I thought made for some great reading.