You sure like to tie every iota of the TES series to lore, though. Just because the games are centered around Tamriel doesn't mean that that's what the Godhead dreams of the most. For all we know there is far more activity and drama in Oblivion than in the Mundus. It's just that these games are based on a medieval type fantasy setting and making them based in outer space isn't really the theme nor the audience they're trying to sell it to. Not everything in the game is tied to lore. A lot of things are just because the employees thought more consumers would buy the product if they did it this way or that way. They made the levitation act in OB because if they had you levitate over city walls, cells wouldn't load. If every outside was external like it was in MW, that levitation act would never have been made. Many people forgot about the Destroy spell in TESI: Arena. That was left out of Daggerfall and has been since. But you don't see any "act" or some other kinda of bogus lore thing to explain its absence.
But that's only your opinion about the Godhead and you're entitled to it.
True enough, though when you get that deep into lore you must not think of it only as what it is, but why it is what it is. In other words, what were the all mighty devs thinking when they set up the whole thing. Obviously they were trying to make a universe that is marketable and interesting, hence why it is in Tamriel and not Oblivion (as you said). Therefore they would create much more lore in Tamriel than in Oblivion, as they need to flesh that area out more because that's where the players are. And thus the Godhead dreams there more, since there is more to dream.
I might be off on a limb here, but I am under the impression that the original Godhead was, in fact, the devs. Dreaming up the world and everyone in it, everything is a part of their dream. As world-creators, they were all "I", since they lived both in the world and outside of it. Perhaps it's just wishful thinking, but when it comes to worldbuilding the world is fleshed out more where the story is going to be, and thus the Godhead would have to dream there more.
I wasn't claiming that the games made Tamriel more important, it just happens to be that way. The games didn't make Tamriel the center, the games were set in Tamriel because it was already the center. Game mechanics and retconning have nothing to do with the Godhead (well, that's not entirely true, but they have nothing to do with him in the current topic).
Do you have any links to the other threads? I'd like to see those pictures.
I have one already that's a pretty good drawing of the wheel, though it's not quite like an onion; layered and all. Thinking that Oblivion is on the outside of Mundus is kinda inside-the-box thinking. Oblivion is another dimension and dimensions exist all around us. So Oblivion could very well be in the exact same spot as Mundus and Nirn; it's just in a different realm/dimension. That same concept applies to ghosts and poltergiests. It's kinda like being on the X axis but just on a differet coordinate of the Y axis, or vice versa.
Hmm... I'd have to search around; I think there was a thread a few months ago that had a link to it.
Yes, there are multiple wheels, all inside one another. Technically there is the wheel on Tamriel, then there is the Wheel made up of the whole Aurbis. The Tamriel wheel is the hub of the Aurbis Wheel.
Quite possibly, though not necessarily. Nonetheless, it changes little of our representation; it would be too difficult to make a layered three dimensional model like that. Much easier to just put one outside the other
Besides, Tamriel is meant to be flat, no?
Are you familiar with the concept of the http://en.wikipedia.org/wiki/Axis_mundi (world navel, tree of life, etc.)? In short, its the "center of the world," and typically the place where the earth was created. In Nirn, this place is, historically and symbolically, the Adamantine tower. Its the first tower, the place where the gods last walked the earth, the location of the pact that cemented the creation of Mundus. Tamriel is important because it has (and therefore is) the center of the world.
Mhm, Adamantine was the original center, but it was moved to the outside when the other towers were built. I believe it was said before that when the elves finished the towers, their own mockery of the Wheel, the entire world shifted to make them into a wheel. Since they made them in the form of the Wheel, they became a mini-wheel.