@ Auguste Dupin
Thanks for the info which reminded me of the Infinite Crisis crossover within the Superman comics (Superman 226, Action 836, and Adventures 649) which shows the differences in the methods of GA Superman (although unfortunately) with Post-Crisis Superman. What's common between them is they both want to do what's right. But if you take what's not positive about their character to the EXTREME logical conclusion their actions will lead to a disaster. It's unfortunate that during COIE GA Supes and SA Supes almost had the same personality. Maybe that's what Miller was going for with Superman in DKR. If you took the Establishment character of SA Superman to the extreme that's how he'll turn out.
@ jllonchas and @ Lois
Of course, I should just look at the opening sequence of All-Star Superman and the basic/fundamentals about Superman is already there. Thanks.
I notice that you too have in depth knowledge about Superman. Was the transition/break from the GA Supes to SA Supes an easier pill to swallow rather than the SA Supes and Post-Crisis Supes? I mean looking at GA Supes and SA Supes was there still a salient feature that tells you: "that's Superman," as opposed to the SA Supes and Post-Crisis Supes that tells you: "that's not Superman." And maybe to make it more complicated, was there something salient about GA Supes and Post-Crisis Supes that tells you: "that is/that is not Superman." You can also pitch in your ideas about the other eras of Superman like the New-52 if you like.
Others are also free to respond. Thanks.