You'll never know me like I know me, and for that you should all be grateful

in that case my genuine self would be... dancing like a fuckin idiot to caramelldansen, wearing jingly cat ears and a fluffy cloak?
.
id legit die if someone came in my room and saw me doing that. my soul would straight up leave my body.

My genuine self is a sad piece of shit then

My real self talks to himself often (I'm talking full blown out loud speaking my mind conversation with myself), makes bad jokes and laughs really hard at them, does dumb things without people noticing, and sings a lot

I spend a lot of time looking through windows, comment on a lot of mundane stuff to the point I just narrate my actions, play out intense scenarios in my head that leave me crying over the death of the son I've never had, laugh like a dying whale, and recklessly do everything I want to the moment I think of it like I'm not the one who has to (/really should) clean up the mess afterwards. I also think it's safe to say everyone's true self farts a lot.

My genuine self just looks sad and sits there staring at the ceiling so— I sure hope no one else sees that

I explain stuff that I'm thinking about as though I'm telling someone else about it, I guess. Just in my head, though, not verbally.
I'm not actually much a spazz in private.

Doing vocal warm ups, and gesticulating as if I'm doing a stand up comedy routine, with breaks for laughter.