Before going into textures I use, I would like to talk a little about brushes.
These are basically the only brushes I use in Photoshop. I draw lines with the one (chalk/pastel like brush) indicated here in bold border. I use either this one or just the round brushes to paint flat colors, in dissolve mode with no pressure sensitivity. When using as erasers, I use the same brushes in pencil mode, again with no pressure sensitivity. No tricks, very simple.
Only very occasionally, I use chalk/pastel 236, which is set to be pressure sensitive. In this case too, in dissolve mode. The reason why I only use brushes in dissolve mode is that I don’t really like the soft edges or gradations of digital brushes. The softness looks a bit too smooth and perfect, and it just doesn’t feel right in my works.
I draw directly on screen using Wacom Intuos. I used to draw traditionally on paper with pencils and then scan in to use as a basic drawing but not anymore. I found it difficult to alter “traditionally drawn” lines with digital lines when I need to fix my drawings in Photoshop. So why not draw digitally in the first place?