I think about this every once in a while. I've grown up playing those games and others like them. I remember how cool the world seemed in World of Warcraft when it first came out, but once I realized players had mapped out the entire game and knew where everything was it really took away from the mystery of it all. This is part of why procedurally generated content interests me. No one else has played through the exact same Minecraft seeds that I have (or at least I don't think so, I'm not 100% sure how it works).