Traditional materials
In traditional drawing, the resistance factor of the material is well felt. It doesn't behave the way you want it to - it has a will of its own. A pencil has a hard time giving up its dye: sometimes you have to push hard, and drawing becomes physical work. Paints and markers give away their dye too intensely, sometimes unpredictably. A simple pencil seems perfectly controllable: it gives high precision, is completely predictable, and is easy to erase. But if you accidentally touch the drawing with your hand, it smudges and you have to redraw.
I like exploring the physics of materials, looking for approaches and know-how to them. Sometimes quite simple and understandable things are technically difficult to implement - for example, drawing white over colored pencils. I remember how at first creating highlights was a quest: dense coloring with colored pencils simply exhausted all the “layers” of paper (the number of “layers” that can be applied to paper is very limited, even on the best paper), and nothing lay on top of them - there was nowhere for other materials to cling to. It is quite difficult to erase colored pencil, you need a special electric eraser, and you can also use white gouache.
I recommend to draw on paper - it teaches physics and figure out.