Shemeska
Adventurer
Celebrim said:but that doesn't alter the fact that the cosmology as it is usually present isn't conducive to campaigning.
Tell that to anyone who ever played Planescape, or just a planar game in general within the Great Wheel.

I mean, as great and original as the Planescape setting was, it got freaking dropped.
Just as a seperate product line. Hell, it's gotten more support arguably than Greyhawk has in 3rd edition. Planes in the DMG (Planescape), 3e Manual of the Planes (Planescape), 3.5 Planar Handbook (Planescape), BoED and BoVD (Planescape), and God only knows how many monsters in the various monster manuals... All of those are just using watered down, less detailed and less stylized material that got massively expanded and elaborated upon or created in Planescape.
As for the whole argument here, it's really boiling down to vanilla and chocolate icecream. Some people can't stand planar games and can't understand why I do. I can't for the life of me wrap my brain around their opinion. Some people like vanilla icecream and some like chocolate but try convincing either of them that they're wrong.