I started to draw this with a square-tipped carpenter's pencil, then switched to a mechanical pencil.
I'm a little rusty with the pencil, so I will have to try the carpenter's pencil later when I'm more comfortable with how to manipulate the line again.
You have to know when to add pressure and when to use the side of the graphite when you use a carpenter's pencil.
I wanted a lot of flowy lines in this drawing and less rendering. I think carpenters' pencils would be better if you wanted a more rendered look.