One more for KoK
I started out in Greyhawk many moons ago, but then as I began to make more cohesive campaigns (we stopped just pulling out the next module in the series and hacking into it), I found that Greyhawk had just a bit too much magic for my taste (this became really apparent to me way back when they put out the super-module T1-4. 1st to 8th level and tons of treasure in no time).
So I migrated to the FR as they had just come out and here were 10th level rangers with only a +1 flametongue to their name. This was what I wanted. Suddenly though, 2nd edition hit and in the change everything I hadn't really liked about Greyhawk welled up. Supra-powerful wizards started popping out of the woodwork everywhere, and there was this wizard who couldn't keep his nose out of everyone's business. I've used recurring characters before in my campaigns, but this guy was too much. He was everywhere.
So I wandered a bit with Planescape and snuck back to Greyhawk now and then, but then Birthright struck, and it was solid gold in my book, and then it died.
A bit later a friend coaxed me into reading his KoK book, and I enjoyed it, but I really wasn't up to investing in yet another game system. So I kept on with Birthright and Greyhawk. One for my low-magic needs, the other for general hacking and a slashing.
Then 3rd edition tore onto the scene and I set my first campaign in Greyhawk again but it was missing something (other than too much magic, and I hadn't yet figured out to halve all xp awards). I read the FRCS, but it was still the same old beast just hiding under a new coat of fur.
Scarred Lands came close, although the magic was still just a bit too much. And then I relooked at Kalamar. It was what I needed, and my new campaign finally found a home.
For high-magic, Elminster and more 20th-level wizards than you can shake a stick at go with FR.
For high-magic, fun and no Elminster go with Greyhawk.
For high-magic, fun and Titanspawn go with Scarred Lands.
But I am going with low-magic, rich background..so Kalamar it is.
John