When you ask yourself "who are you?", it gets to a point in which you go deep into yourself. That is a process that I kinda call (The authenticity of "Self").
Is somewhere lying in yourself. Is not simple question to ask.
I merge myself with this article posted on twitter by [waitbutwhy] writer and it explains you in a interesting way of how to check what makes you.. you.
Science to a weird level. :]
Here is the link for his twitter:
http://waitbutwhy.com/2014/12/what-makes-you-you.html
I also took my time to check a video he referred to check at youtube made by the channel of [Kurzgesagt]. This video is amazing.
https://m.youtube.com/watch?v=JQVmkDUkZT4
As always:
Chronos.