I voted for Greyhawk.
I have a soft spot for Greyhawk: I have GMed in Greyhawk for probably 10 years in total, mostly a long-running Rolemaster campaign while I was at university.
Whereas my default response to Planescape is dislike: the cant I find oddly annoying (as an Australian English speaker a lot of it is just a slight variant on the slang I was familiar with growing up), the adventures I find unplayably railroady, and the "philosophy" I tend to find a bit underdone. I also don't like the nihilistic cycnicism, which I feel is quite at odds with what I enjoy about fantasy RPGing.
I have a soft spot for Greyhawk: I have GMed in Greyhawk for probably 10 years in total, mostly a long-running Rolemaster campaign while I was at university.
Whereas my default response to Planescape is dislike: the cant I find oddly annoying (as an Australian English speaker a lot of it is just a slight variant on the slang I was familiar with growing up), the adventures I find unplayably railroady, and the "philosophy" I tend to find a bit underdone. I also don't like the nihilistic cycnicism, which I feel is quite at odds with what I enjoy about fantasy RPGing.