Looking at all of the posts, "today's Superman is bogus, the silver age Superman ruled", reminds me of hearing people go on and on about how the 40's and 50's were a golden age where everyone got along fine, everyone had a job and America was the bestest ever.
I think what is happening is that we are getting older and long for our youth which happens in every generation. In our case we look at the books that were published when we were kids and go "Ah, if only comics were like this again! I don't understand the world today."
That isn't necessarily the case. I wasn't alive in the 40s, 50s, or 60s. I wasn't even alive in the 70s...in fact, my parent's didn't get married until the 80s.
My point, besides making other people on the board feel really old, is that something changed. My first comics were actually Archie comics, the Superboy series based on the TV show, and the Who Framed Roger Rabbit? movie adaptations.
Crisis on Infinite Earths happened when I was 2 or 3. I didn't go back and read the major 80s revamps until I was in college (er, last year or the year before that) and when I did they kind of made me sick to my stomach. I guess I'm from a truly "post-Crisis" generation of comics readers, meaning that stuff like Crisis on Infinite Earths, The Dark Knight Returns, Watchmen, and Man of Steel were a huge waste of my money. My friend who recommended them to me is older, and I should yell at him...except that he also bought "Whatever Happened to the Man of Tomorrow?" for me.
And that was the turning point. I've been a pre-Crisis Superman fan ever since.