For years, all the art that I did was pencil drawings. A pencil is convenient, quick, travels well, and a wonderful creative tool. I always have one or two hanging about in my purse: automatic pencils, started in grade school.
I started out drawing with just a pencil, usually one of those big fat kindergarten pencils. I love the feel of one of those big pencils in my big hand and the soft dark markings they make. I still have some in my store of implements. I also especially like the Faber-Castell Jumbo pencils. I have several of every softness from 2B to 8B. When I started doing the large complicated pencil drawings though, I switched to .5mm soft lead automatic pencils