Character sketches in pencil
These are pretty loose pencils, but I since I ink my own work I generally find loose pencils are a much better and quicker way for me to approach my art. My pencils kind of evolve as I ink anyway; it's not unusual for me to ink for a bit, then switch back to pencils to tighten or correct something, then move right back into inking. I can also do a bit of a weird fusion; while I tend to pencil "traditionally" (i.e.: with an actual pencil on actual paper), I usually do some digital pencilling, too. Partially that's because I often "flip" my pencils so that I can see them in reverse, which is easy enough to when working digitally as I do. And partially because corrections are much faster with digital pencils, at least in my experience.
Whatever gets you to the final image, eh?