Mercurius
Legend
Stepping back a bit, it certainly helps that we are in a period where all "geek" stuff has gained much in popularity and is now considered more mainstream, so it's easy to see how that might help give a "golden age" feel.
I guess I use different criteria; for me the "golden age" was when I could walk into my hobby store and always find new and interesting products to try out in my game (many just got read, but even that was good!), or inspire new games and settings and the choice seemed limitless (Al-Qadim, Greyhawk, FR, Ravenloft, Dark Sun and Planescape were all being published!).
So for me, as a gamer and especially as a consumer, the "golden age" is the height of 2e.
I can definitely empathize with that. A related, but different inquiry, might be to talk about what period of our own D&D history do we look back at most nostalgically. For most it would be the early years of getting into the game. I certainly feel that way to some degree, although I look somewhat nostalgically at the entire 80s and early 90s period when I was a kid and teenager (in terms of D&D, that is!).
One thing that your post made me think about is the nostalgia I feel with a certain experience that I no longer have, or at least rarely and never like in "the good old days": going to a game store and browsing new and obscure books. I felt that most especially in the 80s and 90s, less so later on. This might even have something to do with the internet, that it has taken away a bit of the mystique of new products because we can learn so much about them now before we buy them. But it also has a lot to do with the loss of FLGS. I know there are some still out there, but it has been a long time since I've been to one that had a feeling of magic about it. But that could also be because I'm no longer a kid.