by definition, don't we describe our own personalities and give ourselves our traits we believe that defines us?
No.
That makes no sense.
Some traits can only be described by others because the definition of them is through other's perceptions. Whether or not you are boring, in the context of this thread, is up to others to find out.
Tha doesn't mean that your social media won't reflect what others think, I'm just saying it's not for us to decide, not that trait.
I guess you can say that you don't think you're boring, but we know that's not what Gold meant in this thread.
Another example: "You are a nice person." It doesn't matter whether or not you think you're nice, it's only how you come across to others that would define you as a nice person.