For me there’s two separate participants, a ‘talker’ and a ‘listener’. My mind identifies more with the talker, because that’s the one that has agency. Since there are two participants, both of which are me, I talk in 1st person plural (‘we’ve got to do …’, 'we thought about this earlier’). I stopped being afraid of being alone after I started having an internal dialogue around the age of 11, since having a second participant in the conversation meant I was always in company.
Edit: Wow, looks like there’s a lot more diversity in this than I was expecting


No monologue, no images, no sound. Just… concepts. It’s a bit weird.
Even weirder is that I can actually conjure images while asleep (or about to sleep, or barely just woke up).
I loved books as a kid, but never understood why people preferred them to movies where you could actually picture what is happening on the page. It took me until my mid 20s to figure out my experience was different to other people’s.
I can get lost in my imagination, it’s just not visual or auditory
I have the same. I believe it’s aphantasia, but I am self-diagnosed so I could be wrong.
I found out about this a couple years ago when my wife started a conversation with me like “do you know some people can’t picture things?”. I had several follow up questions because I thought it was just a figure of speech for the first ~30 years of my life.
My internal voice is exactly like me speaking out loud. If I don’t “speak” in my mind there’s nothing, just like if I don’t speak I’m not saying anything out loud.