You can only be you. The real you. You can pretend for a while to be someone else. Someone you like, someone you admire, someone whose life you envy...
But in the end you must be you. And that's a good thing. Because God created you to be the most amazing you that you can be. He wired into your very being everything that He wants for you to become. It's like there is a secret code He unlocked in you when you saw with eyes of faith that Jesus is who He said He is (and He was very specific on that subject!) and called on Him to be your Lord and Savior.
We can struggle with our identity for many years and wander all over the map in trying to "find ourselves". Jesus brings a clarity to our lives, purpose, and identity that can't be found anywhere else. Other people and things and philosophies will try and bring that meaning to us but in the end, when we stand before Jesus (every knee will bow), we need to be able to say, "I am found in You, Jesus."
So, the desires and purpose that God has placed in your heart. PURSUE THEM! Only then, as you move forward in faith, will God begin to open the doors of opportunity and unlock the God-given talent and gifts and use them to impact this world. No facades, just be you.