You have this great idea and almost always, this great idea won't seem like a great idea anymore as you work on it.
After hundreds of days of doing this self-portrait project, I realize that ideas won't always come out as perfect as you've imagined from your head.
That's why you have to keep on doing it, over and over again until you get to something acceptable.
Basically, the whole process is learning how to fail, a repeated system of doing it over and over again not even knowing if you'll get there.
And through those failures, you find something completely your own.