Ink and Paper.
When I was in high school, almost everything I drew was done with ink (Pigma Pens, magic markers and Sharpies) and paper.
As I’ve been exploring my illustration style and the possibilities with software and digital brushes and drawing tablets and devices and online resources, I lost sight what always made me happiest about drawing. The combination of loosening up my drawing style and going back to ink and paper is making me incredibly happy.
The digital part comes in later. It’s a nice balance.