Sometimes I talk to myself. Most commonly, this is in the form of discourse with myself and another person, except that I play the role of the other person with traits and characteristics that I think or know they have. Often, this tends to be someone who I want to meet in real life. This self-conversation gives me an idea of what it could look like. Though, a very unrealistic and fairy-tail idea of what it could look like.
Oddly, it is not until immediately after the conversation stops that I realize I was having a conversation in the first place. I act and feel as if I was really there. I tune out of life for a moment and shift into this alternate universe, of which I have the ability to imagine anything. When things drift far enough from realism is when I usually tune back to real life.
I doubt I'm the only one that does this. Most are probably just like me, hiding seemingly weird quirks from all but the closest.
But, maybe it's just a sign I need to talk to more people.