Time after time I have encouraged singers to go overboard with their acting - to really throw themselves into their character.

It never fails. Their technique actually improves, because they get beyond their critical thinking and use far more body energy.

Instrumentalists can do this as well, by inventing a character for themselves or feeling as if they are dancing with their instrument. 

Please try it the next time you perform. Give yourself permission to think of nothing but expression. Overdo the emotion, the passion, to the point that it might feel silly, campy, or over-the-top. Record yourself, or just ask those attending about the results. I bet you will be pleasantly surprised!