The only bad studio is the unused one.
I always thought signing was an artist's honour and guarantee of authenticity.
No matter what your disciplines, you need your own personal lists.
It's okay to doubt. It's important to test. The way to discover secrets is to be a student of your own efforts.
In painting you cover up your sins and everyone thinks you're naturally talented.
While this may seem peculiar, the combo of work and distraction leads to levels of innovation not often generated by structured, focused thinking alone.