I'm thinking back, I actually knew a girl at work who talked to herself a lot when she was making decisions. She verbalized even small moves she was about to make. No one judged her outwardly or secretly. No one thought it made her crazy. If anything, it showed that she was careful about her decisions and those decisions were typically very good choices at the end of the day.

I knew another man at work though who talked to himself a lot who was often scolding and judging others critically under his breath, mostly customers and clients when they weren't around. I think we all judged him a little bit. It understandable to be frustrated and let it slip, but to the extent he did it, it was hard to trust him. If he could be so nasty about others maybe he could be nasty about us.

I think it kind of depends on what you're talking about with yourself when others are around. I would sometimes mutter to myself when I made a little mistake, or rather I didn't do something to my high standards, and I sensed that maybe people thought I was making bigger mistakes than what I was uttering. I didn't want to seem careless. So for that, it took some time to control the quiet outbursts to restore some professional demeanor.