Those "nose to nose" moments early on were "scary" - still makes me laugh when I see them. The other thing that struck me as really unnatural - and in later series, was the hand on the hip. It always reminds me of a pregnant woman with backache. I'd love to know who made the decision to persist with that stance.
And of course there is this scene
where - of course I realize that acting alone in front of a camera is not easy - she has the body language of a Thunderbirds
puppet. She even raises her hand as if it were operated by a string.