As usual, I couldn't pick just one thing. I'm still not very good at drawing so I need to start in pencil. (Ever notice how most pencils have erasers on the ends, but "drawing" pencils never do? It perpetuates that myth that talented people never need to erase lines.) The green pencil is a Kimberly HB pencil which is my favorite. Once my pencil drawing is satisfactory, I trace over it using that Pigma Micron pen in the middle. This is my oldest pen, and all the writing on the barrel has been smudged off. Then I add accents sometimes with the Pentel brushpen. While I like the brush pen a lot, it's tricky to use. Making a thin line with it means using very little pressure on the papaer and that betrays any little shakiness in your hand. This sketch was made with the HB pencil, then the micron pen, and the border and the brush pen were done with the brush pens.