Generally, when drawing an illustration, I keep the line work controlled and neat, because I like the way it looks when I draw that way; also, I can control the addition of colour more easily. However, I also really like the way some of my sketches turn out and not wanting to finesse them into a tidy drawing, leave them as is. This in turn means that if I colour it digitally I am leaving quite a bit of it up to chance, and whether I closed in an area or not. Fun!