I think the feeling still exists, it's just rarer. I got it when Starcraft II came out, I played the campaign three times, and no doubt will again with The Witcher 2, but you're right, not so many as there used to be.
I think for me that golden age happened more recently, in the 90's or early 2000 I had the strongest feelings, from Baldur's Gate through to KotOR, and the others inbetween like warcraft and diablo, prince of persia, by that time I was passionate, really loved games, as an experience, as an art form, like reading a book.
In my earlier days it wasn't so strong, all those adventure games for instance have nostalgia to be sure, but for me the rush wasn't there, the same with games like Settlers and Dune II, even RPGs like Dungeon Master, Daggerfall and Wizardry, although, I was pretty excited when Wizardry 8 came out after the long wait :)
hercufles: true people get older but games evolve as well things that were hard in the older games is makde easier today. But what i miss is I know long time ago you had to read the manual to understand a game I remember when i bough a game I always looked at the manual and get exited over what the game had to offer so my old games dont have manuals anymore since i mostly lost them :) But the games i got now i dont even bother to read the manual. Most manuals are only tick cause of the many languages it is translated. I was a big nerd back then getting all the boxes to feeel how big the manual was the biugger manual it had the most change i bought it so i could read it on my way home :)
Do you remember the manual from Diablo I? That's a nice example I think for what you're talking about, great backstories, great artwork . I miss them too. Arcanum had a good one I think, the RPGs of that time were the manual's dying breath :( That's probably what I miss the most. Now I'm sad :(