The Paradox of Authenticity
If you are trying to be authentic,
you are not being authentic.
If it is "bad to be fake" and the definition of fake is 'not genuine; imitation or counterfeit' then it's safe to assume that it is good to be the opposite, which is genuine, authentic, original, or the real deal. Simple! So now that we know how to avoid being bad (fake) and what to do to be good (authentic) all we have to do is the good thing, which is to be our amazing, authentic selves. But what happens when we try to be authentic? Just by trying to be a certain way, even if it is "you" you have entered what is called:
The "Paradox of Authenticity"
Whenever you are trying, you are not being authentic.
Every decision we choose that did not spring forth from our own imagination is a form of taking advice from others and in effect copying them. Now this makes sense, but you have to get mad if you think copying is a form of fake-ness, and voila the walls of stigma arise. We can only even learn to live in this world by copying our parents. Imagine having to always act like your original, authentic baby self before you started imitating your mom and dad. Or better yet share all of your stream of consciousness thoughts and feelings on your next important job interview or worse yet, first date. Whether it's our parents that we admire, a boss we need to impress for a raise, an autobiography we read of a hero we want to emulate, or attending an event we hate with our loved one (take your pick: ballet or baseball), we are always molding, editing and improving ourselves for the results we want from the real world.
Every act you make is not authentic just because you do it - more than likely you got the idea somewhere, and from someone you copycat you, so get over it.