A pre-3e D&D campaign wherein every inherent quirk, every strangeness, is not only present, but also glorified, revelled in, and what's more,
made to make sense. Yes, I know that the last bit goes against the oh-so-popular mantra of, "It's just a game ffs eleven!" and the like.
Even so, and keeping in mind that I mean "make sense" in terms of some older D&D setting or other
only.
Not in modern day real world terms. Mm'k?
A campaign where the essential "D&Dness" is amplified, "fictionated" (after the fact, natch), and - one might hope - thoroughly enjoyed by all.
No, not freakin' Eberron. Neither Ptolus. Nor Barsaive. Nor any other setting you might have in mind, that says to you "D&D that makes sense". Why? Because, for purposes of this, my post,
you're wrong!
No, really.
The DM would be using the weirdest of the weird settings from way back.* Preferably with either AD&D 1e or OD&D rules.
Not some modern simulacrum.
* Which is...?