I heard or read a study a while back that said people talk to themselves 95% more than they talk to others.

So I wouldn't worry or feel it is abnormal. If fact little children do it all the time in self play and they even have their dolls and stuffed animals over for tea parties.
I think that is why we are so attacted to cell phones and all the networking we do now. We like to think out loud and practice thought patterns and our brain like to exercise the ability for thought and processing.

We even do it more when we are angry or dealing with a lot of stress.

Don't worry about it, it is normal, we are our own best listeners.

Open Eyes