I draw in pencil using a 'Lead Holder', used primarily by professionals in the drafting and architectural fields, I believe. I've been using "Sanford TURQUOISE" brand "H" lead now for many years. (I avoid using it's closest competitor because I find their product to be too "waxy.") Sanford's Turquoise "H" lead is soft enough and dark enough to give me that sort of sketching feel, while remaining clean with a minimal amount of powdery lead smearing. And when your printing from pencils, the two most important things are to have reasonably dark, pristine pencil lines and a very clean white page. In the past I've also used the softer "F" leads (Jim Lee's brand of choice, at least, when I was there.) and "HB". These both also work for that slightly more sketchy feel, although these days I'm usually too lazy to switch. I suppose that I find that my choice of "H' seems too straddle that very delicate line of being "HARD", without being diamond hard and therefore not dark enough on the page, and "SOFT" without being too soft and smeary and crubley. I do just about everything everything with my "H" lead now, including random sketching.
And I seem to prefer the 'Berol Turquoise' brand sharpener. I usually change these out about every 4 to 6 months when they usually stop grinding the pencil very good. And Don't foret to dump these out regularly!