When I watching myself on video, I notice these things:

1) bad posture;

2) improper positions of head, hands, hips, foots, etc.;

4) small steps or movements without power;

3) incorrect movements or steps.

So +1 on good posture, which is result of proper emotion. I even created special trainer for that. :-)

PS. 4 years in ballroom sport dancing (10 dances).