I’m not 100% I’m picking up what you’re putting down here, but I’m going to try.
Arrogant as it might be, I inspired Quill - they started out as a possible self-insert-sona of sorts, and they are meant to be almost kind of reader-insert a little (their first life including that they are a fan of One Piece, so as fans of One Piece are more like to read the stories for them, makes that connection.)
But Quill differs from me in that they had a harder life in their first life, they’re not as trusting, they’re way more extroverted, and they’re not afraid of bugs. XD
Quill also enjoys fighting, and while I know how to fight (and have been in fights), I do not like fighting.
Which makes it hard to answer what I think was the start of your ask - how would Quill react to me as I make them, and since they kind of slowly morphed into their own self it’s hard to imagine them looking over my shoulder xD
As for what the everyday Dave thing and being limited to communication, one thing Quill is really good at is communicating. And I don’t mean like, talking about her feelings or rousing an audience with elegant speeches, I mean he picks up languages like a sponge.
So I imagine Quill would adapt well to being limited in communication xD if all else fails they’re okay solving misunderstandings with violence, for better or worse >.>