I've thoroughly devolved back to EGG's article Planes: The Concepts of Spatial, Temporal and Physical Relationships in D&D, adding inspired or complementary details from Supplements III and IV, and touches of things that I like from other sources (devils, from the OAD&D MM, some of the themes from JG's Wilderland's products, Dante-esque touches, nods to things dreamt up by de Camp, Moorcock, and esp. REH and HPL) all topped off with bits lifted directly from Greek and Norse myth.
Essentially, I guess, I went back to the ground basics and built up again something that gave me exactly what I wanted.
Essentially, I guess, I went back to the ground basics and built up again something that gave me exactly what I wanted.