Hello! I use Adobe Illustrator (AI) in creating my illustrations and AI lines are vectors so they do not appear fuzzy or pixelated unlike the lines in Photoshop. I only use Photoshop to add some effects and textures—I rarely use it for drawing. For complicated details, I usually draw the image on paper first, scan it and trace it using Illustrator. If you’re really into digital art/graphic design, you might also want to consider investing on a pen tablet unless you use a mouse with your super flexible hand :)
In response to your tutorial/work in progress post request, I will try to make time for that.
I hope this answers your question. Thanks for dropping by my site! :)