Deviantart is wonderful for several reasons. Not least is the wealth of fantastic photo ref available. 'Barbie Guitars' (real name unknown) is a model, artist & photographer, and to me she looks like an Ian Gibson character made flesh. These sketches are based on her, and were done to practice inking. More importantly, they were done to practice inking small. If left to my own devices I'll draw everything on A3 or bigger, but that don't fly in comics, so each of these is 10x12cm.