For my part, when I discovered the LW material (via MoR, as it turns out, though I had independently found "Creating Friendly AI" years earlier and thought it "pretty neat"), I was thrilled to see a community that apparently understood and took seriously what I had long felt were uncommonly known but in truth rather intuitive facts about the human condition, and secretly hoped to find a site full of Nietzschean ubermenschen/frauen/etc. who were kind and witty and charming and effortlessly accomplished and vastly intelligent.

It wasn't quite like that but it's still pretty neat.