Re: Draconic theirian or not
*grins* with regards to the "kin" portion of otherkin, I've always felt that to be as such: "Other, but still kin (to the rest of humanity)" and explicitly about the "inside" not matching the physical body. This body is the -kin part, the Self is the other-. After all, the term otherkin doesn't refer to the shape of the other, but the fact that one is somehow "other" at all.
Anyways, I have typically regarded "therian" to be any earth-native, non-human creature. Everything else, including the fae, celestials, dragons, what-have-you, fall under the personal-use label of "Mythic". Mythic then spreads into various categories, so on and so on.