Yeah, I noticed that. He inspired everyone to become similarly grave and twinkly in his presence. It's a gift.

I did have my first and probably only ever nostalgia for adolescence recently, while reading Cory Doctorow's Little Brother. But that's mainly because his protagonist is a 17 year old geeky political activist using the internet to overthrow a quasi-totalitarian Department of Homeland Security, and it made me wish I'd started engaging with technology and politics earlier. (It's basically a manual for subversive geekery and I want to give it to every 12 year old I know.) That's not quite the same thing, though!