Authenticity

According to Wikipedia (The biggest multilingual free-content encyclopedia on the Internet), authenticity is a psychological concept in which the individual derives gratification and positive emotions from exercising signature strengths and values.

Seems like a hard way to say, be your natural self (or in a fancy way you could say 'exercising your signature strengths and values'), and while you are at it, no need to apologize, in fact the world will give a standing ovation because you'll be so naturally undeniably attractive :-)
Damn, being your natural way just seems to work!!!!!