Energy

The public feeds off the energy we provide to them. They can detect if we are tense, joyful, sad, etc. by what we project. 

If you are looking out for who is looking at you (which many trans people fall prey to) they will detect that also. 

What they want to see most is someone who knows who they are and is self-assured enough in their own skin to not care what about what others think. 

Easier said than done but once there we feel it.