GuyBoy
Hero
Great question. Personally, I have used loads as a DM and also love encountering old stuff as a player. My favourites include:
Greyhawk as a setting
The Giants series of modules
Tsojcanth and Tharizdun adventures
Anything by Jennel Jacquays, particularly Thracia and Dark Tower
The Keep on the Borderlands as a base
Recently DM-Ed the whole KotB inc Caverns of Chaos
Guess I just love the old stuff!
Greyhawk as a setting
The Giants series of modules
Tsojcanth and Tharizdun adventures
Anything by Jennel Jacquays, particularly Thracia and Dark Tower
The Keep on the Borderlands as a base
Recently DM-Ed the whole KotB inc Caverns of Chaos
Guess I just love the old stuff!