There are so many worlds Ive played during my 35 years as GM Yes, over 50 and still playing RPGs. I must confess that Forgotten Realms been my favourite, but Greyhawk deserves to be Raised from the Dead and at have least 10000+ articles compared to Forgotten Realms Wiki that has 26,500+ articles.
Then we have Mystara, Eberron, Dark Sun, Spelljammer, Krynn, Ravenloft etc and now in November there will be Ravnica from Magic the Gathering. A lot of writing.
Please help us to lift up Greyhawk to the level it deserves.
BR Kenneth