I was reading another thread about the fact the new players know nothing of the older settings when playing D&D. So I thought this would be a good time to explain the older settings to them, and why they were good in their own way. For those that did love the older settings, now's the time to pitch your favorite D&D world. I was starting with Greyhawk. What made Greyhawk fun to play and what made it different from the other settings? Why would a starting player want to begin a campaign there?