Well, Jane, you already have a lot of great suggestions but I thought I might add a few.

I prefer to be myself

Rousseau said: "Nature created me and then broke the mold." (Mold is an acceptable spelling so I won't change it.) " It sounds conceited, however, it applies to everyone. Unfortunately, most people can not ("can not" - when written as 2 words, emphasis is placed on "not") stand the loss of their own molds, so they create a public mold that remakes themselves again. This results in everyone becoming so similar to one another.
To become a real your true self is not an easy task. There are many people you can feel are just about their career. They present a kind of identity or  role, but not their true self.
If a person always lives according to the opinions of others without having his own independent thinking, and is always busying with external affairs without having their own inner life, you won't be able to find anything whatever, from head to heart, that truly belongs to him. He will just be a shadow of others or like a machine.

One cannot live life on earth without a friend. We can't miss the most important friend of all, that is oneself.
I want to become any person, experiencing any kind of life, including that of a king, a plutocrat, a saint or a monk, and I am even willing to become a fly or a robber, but the goal is to change back into my true self. So, in the final analysis, I prefer to be myself.

What a terrific essay, Jane!  You have expressed your thoughts on difficult topic very well.  Congratulations! I hope my suggestions along with the fine suggestions made previously will be helpful for you. 

I prefer to be myself

Rousseau said: " nature created me and then broke the mould mold. " It sounds conceited, however，it applies to everyone. Unfortunately, most people can not stand the loss of their own mould(s), so they use public model to remake themselves again.  The results become so similarto result is they all resemble each other.
To Become a real yourself your true self is not an easy thing.There are many people, you can say he is they are just a single dimension something, such as a career, a kind of identity, a role, but not themselves himself.
If a person always living lives according to the opinions of others , does not have its their own independent thinking, and always busying with external affairs, not having without their own inner life, you . You won't be able to find anything whatever, from head to heart, that truly belongs to him. he is just a shadow of others or a machine .
Life on earth we can't have no friend.In all of friends, we can't miss the most important one , that is oneself.
i want to become any a real person, experiencing any kind of a real life, including the king ,plutocrat, saints, monks ,robber etc and even willing to become a fly, but the premise is to change back into myself .So, in the final analysis, I prefer to be myself.

Lots of thought and difficult concepts and philosophy here!

I prefer to be myself

Rousseau said: " nature created me and then broke the mold in british englisthis is spely MOULD). " It sounds conceited, however，it applies to everyone. Unfortunately, most people can not (CANNOT) stand the loss of their own molds, so they use public model to remake themselves again.The results become so similar to each other.
Become a real yourself (BECOMING YOUR REAL SELF) is not an easy thing.There are many people, you can say he is just something, such as a career, a kind of identity, a role, but not himself.
If a person IS ALWAYS living according to the opinions of others ,THEY DO NOT have THEIR own independent thinking/THOUGHTS and ARE ALWAYS BUSY with external affairs , not having their own inner life. THEY won't be able to find anything from head to heart that truly belongs to THEM. THEY ARE just a shadow of others or a machine.
Life on earth cannot be one of no friends/ cannot be one without frineds. OF ALL friends, we can't miss the most important one: one's self.

[below: I'm not entirely sure what the intended meaning was]

i want to become any person, experiencing any kind of life, including the king ,plutocrat, saints, monks ,robber etc and even willing to become a fly, but the premise is to change back myself .So, in the final analysis, I prefer to be myself.