Yes, I do. What's wrong with talking to yourself now and again? It's sort of fun and keeps you from being bored when you're bored. To be honest, I think everyone does, once in a while. I don't know anyone who doesn't. I bet eshorse does too. I bet GOP does, I bet Sandy8 does, I bet almost everyone does.
It's awkward, but I picked it up from my professors. Bad habit to develop. Dr. Lisa Firestone says its good, cause you can listen to yourself, and determine how stupid or illogical or brilliant you can be. Often times, there's a lot of really dumb and illogical things you say, but it's great to keep it to yourself. Best to say okay that's dumb and then deem oh well just me. Why share stupid nonsensical ideas with everyone, that's just dumb.