We do not see yourselves as others see us at least as far as body language is concerned. The British Psychological Society Research Digest reported on the work led by W. Hofmann (here). People were video taped and the recording shown to the subject and to others.
…The premise of the new study is the tip-of-the-iceberg idea that what we know about ourselves is fairly limited, with many of our impulses, traits and beliefs residing below the level of conscious access. The researchers wondered whether people would be able to form a truer picture of themselves when presented with a video of their own body language… they weren’t able to.
…What was going on? Why can’t we use a video of ourselves to improve the accuracy of our self-perception? One answer could lie in cognitive dissonance - the need for us to hold consistent beliefs about ourselves. People may well be extremely reluctant to revise their self-perceptions, even in the face of powerful objective evidence.
…”When applied to the question of how people may gain knowledge about their unconscious self, the present set of studies demonstrates that self-perceivers do not appear to pay as much attention to and make as much use of available behavioural information as neutral observers,” the researchers said.
This seems a fairly general situation. We are often very surprised at how we sound on recording as well as how we look. And we are often surprised at how others assess our attitudes and motivations.