The desire to express oneself can certainly take on a myriad of activities and behaviors. Some may seem more rational/logical/sensible/etc. than others. Although, I’m not sure that’s important.
It seems to me that what’s paramount is the self-expression itself and the effect it has on one’s soul. Playing music, writing, attending Burning Man, dressing up as your favorite superhero or water-coloring on the weekends may satisfy that itch in oneself. There is really no rhyme or reason and it need-not make sense to anyone but you.
I believe the key is this: find that simple way to express oneself in order to scratch that itch. Not trying is our only failure.
We’re here to express our individuality as the perfectly flawed person we are in any way we can that enriches ourselves and others. As a result, we may not be the only ones who benefit from it – those around us may feel the positive residual effects as well.