Leaving messages

Do you leave messages? When you call someone, and they don't answer. The dreaded variant of "leave your message after the beep."
I don't leave a message. Almost never have. Perhaps in times past I may have left them more often than now.
I don't really know why either. Leaving a message is in its essence quite simple. Except that you only have one chance, don't want to mess it up. Those awkward pauses, emphasized when leaving a message. They seem to drag on for much longer than they really do. In reality they're quite short, simple and non-threatening, but in the process of the actual message making they seem to last a lot longer.
Unlike normal conversation, when leaving a message, I am overly conscious of my flaws.

Too often I'd find myself rethinking the message I had just made. Thinking of how it could have been better.
These days, the days of caller ID, I no longer leave messages. I'll just wait for the call back.