Case#1: A fresh graduate was waiting in a line for a job interview. He got a message from one of his friends; "Hey dude, good luck and just be yourself". He replied; "I'm being the one that the company needs, not myself obviously".
Case#2: A husband divorced his wife because she didn't know how to cook. Two months ago, the man said; "I love you for whoever you are, just be yourself".
Life is a stage, we are the players and fake is the conflict. We have hidden personality and we also have 'what-you-are-supposed-to-have' characteristics. I don't agree with the word "be yourself" because sometimes what is ourselves is something that is disgusting to others. I loved when Tyra Banks said; "I want you to be beautiful inside out" because we are imperfect but we can make ourselves better if we learn how to change. We are not defined as what we always defined as 'ourselves'; in some situation YES, but most of the time NO. Please stop saying 'be yourself' if you don't really mean it.
You can edit photos. However, you can't edit your life; but, you can make attempts and learn from mistakes.