Silver Age era will always be my favorite. Sure some of the stories were ridiculous but for me that was part of the fun. 50s-mid 60s are just absolute fun for me with beautiful art. Ant-Head Superman? Giant Turtle Olsen? Wacky scheming Lois vs. Lana? Yes, more please!
Late 60s-early 80s Superman did not do it for me. At all. I didn't like Clark as an anchorman or some of the new characters like Morgan Edge and Steve Lombard. 70s and onward just feels rather...lame. Julie and Curt (to me) seemed to be phoning it in. New characters like Vartox or whatever his name was were lame beyond belief, is this what they thought kids at the time wanted?? Not that there were no good stories, but for me this is the darkest time in Superman's history. There is a feeling of sterility and just plain blandness in the titles at this time. My friend used to say that reading a 70s or early 80s Action Comics was like eating a cold bowl of oatmeal. I agree. The fun/out there stories of the 50s and 60s are mostly gone. What we get is more serious, and at times a ham fisted attempt to copy some of the Marvel staples of story telling, which wouldn't really come into their own on the Superman titles til Byrne showed up.. Again, I do want to say that I enjoyed some stories from this period, but it was mostly blechhhh to me.
Post Crisis was a mixed bag for me. Obviously some sort of update was needed. But I felt that Byrne kind of threw out the baby with the bath water in some ways. Never warmed up to the sterile Krypton, football hero teen Clark, Kingpin-Luthor, etc.. But a lot of good stories came out of it. Loved the Eradicator (that was 80s right?). The extended Superman exile in space was a highlight for me. I guess that was maybe a bit after Byrne? Hard to remember.. Anyway the #1 thing Byrne brings to the table here is a new vitality and sense of excitement that Superman had lacked for over a decade.
In the 90s, again we have a mixed bag. Lots of titles were going, some were better than others. Definitely some great stories during this era. For something that started out as a stunt, the aftermath of Death of Superman was a lot of fun. I did feel that the supporting cast got a little out of control in some of the titles. Certain issues I felt I was reading more about Guardian, Cadmus, that weird big blue guy from Kandor, the huge Daily Planet cast, etc.. than I was reading about Superman. I felt the Lois marriage was a mistake.
I never really read enough of the post 2000 stuff to really get a feel for it, but based on the little I did read I felt that a bit of weariness was creeping in, much like it was for the last years of pre-crisis Superman. Lack of direction and throwing lots of stuff at the wall to see what sticks.