Drawing on a piece of paper with a simple graphite pencil was definitely the first medium I used seriously (before the crayons and makers!) And although I traded in the 2B pencil and vinyl eraser for a long time once I discovered digital art, I made time to bring it back into my artistic endeavours.
I love graphite work because it helps me to focus on rendering values without having to worry about technological steps and colour.
(These are all sketchbook works. I do not claim rights to any of the reference photos used.)