As long as it works for you, it's all that matters. My self-convos tends to be incoherent drivel, often bordering madness.

I tend to rehearse conversations that'll probably never happen, so if they do happen I come off as witty. Only I forget that I'm doing it aloud, or moving my mouth. On the flipside of that, I also forget to say things aloud instead of in my head.

Saaaame! I got stopped by my manager once asking who I was taking to, since she "heard a second person" not realising I was replying to myself in another voice.