There's lots of threads for "this music is me" or "this picture is me". But, what "me" are you referring to? Sometimes people try to mix between the internal and external. However, I personally find it to be more satisfying to see and share things that reflect an individuals internal world. While the external tends to be more illuminating about a person in my opinion, the internal gives a different perspective. It allows one to share an aspect of themselves that really only they can experience. Words can sometimes do somewhat of a decent job explaining it, but it's ultimately inadequet. The internal world is something one has to experience, and sadly there is no way to do it.
Instead, using images, music, videos, sounds, etc. can give something better. They encompass things that words can't produce well. You know that feeling you get when you see something and go "oh, that is ME!". Not literally, but something about it captures an essence of yourself that you're never able to explain or share because it's purely internal.
That's what this is for. Instead of defining what the internal world is, and how to share it, I'll leave that up to you. Because ultimately, our own internal worlds are what will dictate what that means. Unfortunately, this means there will be a lack of consistency, and it may be difficult for everyone to "get out of it" what was intended. It's very hard (if not impossible) to force the same reaction/feeling/understanding from something that you experience yourself. Thus, this is the best we can do, and this will ultimately be more satisfying for the poster, and much easier for them to do.
Try and keep it to 1, 2 maybe 3 things if you must. What is it like inside of you? What personifies it? How do you feel? How do you think? How do you experience? What is it like... you decide what that means.
Have at it!