On occasion something (like a bolt of discomfort from the past) will impinge on my consciousness sufficiently that I’ll briefly comment out loud.
It helps maintain distance from other customers at Kroger.
So true.
Of course. I’ve been talking to myself (or thinking out loud) my entire life. It helps me work things out. Doing so totally prepared me for a career as a radio personality.
I’ve often described being on the radio (as a music DJ as opposed to a talk show host) as sitting in a small room for 4 or 5 hours talking to oneself. I’ve known people who tried for a career in radio but didn’t make it, because they simply couldn’t get over the thought that they were talking to themselves. If you’re lucky, there are people listening, so you’re not really talking to yourself, but since you never see them, it’s a rather abstract idea.
However, I wouldn’t do it within earshot of anyone else, but I often try to work something out by conversing with myself while driving.
I talk to the dogs all the time. If anyone asked I’d tell them it was to reassure the dog, but in reality, who knows.
I talk to the dogs all the time. It’s usually something like excuse me, stay, don’t get up while I step over you (or we would both tumble down the stairs).
I curse at the computer. I’m a programmer. It does not seem to help or care. 
Some of the comments in a former programmers code that I see once in a while are a bit… blue.
The guy in the next cubicle is constantly singing and laughing to himself. Meanwhile, I’m sitting there wondering what’s so funny.
I talk to myself too, and curse at computers occasionally.
No, don’t listen to him, he don’t talk to himself, he talk with me. 
Yes, I do. And I hum and I whistle and I make noises. I talk to the toaster in his own language, same for the coffee maker. I also talk to my wife onomatopoeiacly, like we used to with the cats. She understands. Or pretends to.
Perhaps the guy in the cubicle next to the next cubicle’s guy’s cubicle? On one side or the other.
Same here.
I tend to talk passive-aggressively to myself when I do something stupid.
“I’m not one to talk, Tibby, but that was a real smart to do. You’re a real brainiac, you know that? Yep, slicing your hand wide open with that paring knife was the most intelligent thing you did all day. Darwin Award contender, you ask? Naw, that’s for stupid people, not you kemosabi.”
What’s weird is talking to my two snooty Siamese cats.
They openly disapprove and show disgust.
Bear will often give a meow that sounds like a curse word.
Of course Li’l Meeko agrees.
I talk to myself about my Mixed Media art.
I’m usually in a pickle about it when I do.
And of course I talk in my sleep.
I never stutter when I’m unaware of speaking.
Oh, sleep-talking!
When we were kids, my mother said my sister and I argued with each other while asleep! She said we would yell from room to room!
Married couples have their own “love language.” Mr VOW’s way of communicating to me when we’d each be asleep, or half-asleep consisted of a pat on the butt.
It could mean so many things!
“Roll over, you’re snoring.”
“Stop grinding your teeth.”
“I love you.”
“Shut up and go to sleep.”
~VOW
Last night, I was listening to my husband snore, and the little dog between us was growling in response, in his sleep! It was: RRR rrr RRR rrr RRR rrr 
That’s cute.
Pat on butt!
Keep that man!!
I’ll talk to pets or, occasionally, equipment that is giving me trouble.
I don’t do any of that out loud, although my wife and son each carry on conversations and arguments with themselves while hardly lowering their voices.
My general rules:
talking to oneself is fine;
arguing with oneself is OK;
but if you lose the argument(s), you may have a problem.
One of my dogs does a tiny little ‘woof’ when in a dream. I think it’s really cute.
i don’t talk to myself but my husband likes to point out that i frequently laugh at my own jokes
(but in actuality i’m usually laughing at his reaction to my jokes, but i suppose the distinction is mostly irrelevant 
)
My cousin and best friend has shared with me that she laughs in her sleep and it kind of freaks out who may be with her.
It’s better than nightmares. But might give her amour pause…