I talked a bit about mediums, and I do want to say that currently I use mostly digital. However for process, its a fancy sketchbook to me :)
For instance: Image below is kind of a psuedo watercolor (thanks ClipStudio Paint!)
With most digital artists who haven't touched a pen to paper in a while I see very stiff art, whether it be they've only drawn from a 3D model they can adjust, or copy a photo or whatever, but it always comes out stiff. I could make a few assumptions, however in my own opinion I think learning how to draw on paper will help many learn why line work from paper is the way it is.
I guess what I'm really talking about are those "solid emotionless lines" where there is a lack of pen pressure, or mistakes. When I look at a piece of work I do want to see the effort, but if you're drawing emotion, even the lines have to have it. And "mistakes" are where we see it
NSFW but a good line style example!
In the work above the few mistakes I make add a little "humanity" into the work, and its kinda the reason I leave it. Having something too pristine, too flat, too lifeless, too emotionless has a tendency to make lackluster work, and I've noticed those who don't practice on postits from work, classnotes, that random receipt or napkin, kinda lose out a bit on the dynamics a pencil and pen can teach ya.
TBH if i were wealthy I'd probably still be using a canvas and art. Digital programs are great and cheap. But they're easy to fix mistakes. Learning how to draw on paper and totally fucking up a few times will teach someone the benefit of doing it right the first time, or at least teach em to find "useful" mistakes
I always recommend to everyone who does "digital only" (and who has only done digital) to take a few art classes, learn how charcoals, watercolors, temperas, colored pencils, markers, pens, oils, clays, inks all work just so when you got back to digital, you know how it should look, how it should FEEL
Because FEELING art is really where its at. A beautiful piece is beautiful, but ask yourself, why is it beautiful? Why are famous arts so famous?
Why do those old oil paints look so FRESH and DYNAMIC still?
Have some lewd art for reading my brainfarts and opinions ^_^