I have continued using coal for the past weeks & I surprisingly loved it more than pencils and pens.
There is something very particular when working and drawing with coal because the movements of your hands are completely different and you soon adopt different technics of drawing. Coal allows you to work with light and color nuances and gives depth to the drawings and to the people you draw.
I would advise coal to anyone who wants to draw raw and profound art. And desire to play with light & shadows.