I talk to myself all the time. My boss jokes that this is why I've got an office instead of a cube. It's not a conversation, as such, though. More like "What the f#&k is wrong with this stupid thing? What the hell do you MEAN 'type mismatch'"? Where's the f#%king mismatch?"
I do the same exact thing. But Tiana's cleaning lady sounds like a different kind of thing.