Smile. Be Consice. No "stuff"

Yesterday I had another one of those management communication workshops where we do some communication activity on camera and then watch ourselves, get feedback and then do it for a second time.

What did was the main feedback i got this time? I need to smile more, be more concise, have a more upright posture, and stop saying "stuff".

When i came back I watched the videos from my two previous workshops. I felt i had done a wrose job in the later one! May be i am becoming more self conscious trying to change my style. Or may be it is just the mood.