i personally feel that if you are post-op, you shouldn't be labelled TS at all. that's my opinion on it. i'm less sure about it, when it comes to pre-ops (like myself). if i call myself TS, people might think i'm "therefore" not a woman. but i am. so to keep it accurate, i might think to not call myself TS... but if i do that, people will think i've got female genitalia. which i don't. so i go back to the thing of calling myself TS again... and it goes around in an endless logic loop.
i seem to settle on calling myself "mid-transition" because, as most people don't know what i mean by it, they don't bother thinking anything of it. yet if somebody were to assume i have female genitalia, i did say something that might've warned them. it's a bad compromise, but i don't see any perfect solution, so i make do with it.