WOW! Well, count me as a 'no' voter! When I do talk to myself, it's done in my head... but I'm a very empathic person, so I consider what someone else would consider about me before they've considered I've considered what they could have considered, and so, I care whether or not the people living with me think I'm a nutter.
And I don't think I'm doing a very good job at defending that position right now but there you go.
I personally was taught at an early age to control my tongue and that it could get me into trouble. Whenever I log into any voice chat service (xbox live, ventrillo, whatever) I wish that others had the same lesson, because there's always someone who finds themself to be the center of the universe, talking not to others, but to themselves, clogging everyones earpieces with their vocal upchuck.
I'm not trying to be offensive by this post and I apologize if I do come off as such, it's just how I am.