I remember as a kid just sitting there going through his d&d collection. He's got so many random things scattered in there. I used to love just reading the dungeon modules and the books looking at the maps and artwork and reading through the books.
I'm kind of disappointed with the way the game went after wizards of the coast bought up d&d. I never really liked the 3rd edition rules and the books, though beautiful and colourful, weren't as appealing to me. There was something about those dark gritty black and white line drawings in those older books that still looks better to me.
As far as I can tell now, it's not even really the same game any more. It looks more like a pen and paper version of an mmorpg than d&d these days from what I can tell by the bit i've looked at the latest rules.
It also seems to focus on being a 'hero simulator' rather than being a sword and sorcery adventure simulator than it was before. I've always prefered low fantasy sword and sorcery stories to the long sprawling wheel of time style epic sagas. Stuff like Conan and Michael Moorcock's books. That's what the game used to be more like.