Really, I'll use any of the sketch types given to animate when I do. :T Most of the time I'll sketch in the entire leg, instead of leaving a simple line. All my sketches are different. >.< I usually color-code them. If there's more than one cat, the other sketches will be different colors. Various details, things I want to animate, or stuff I want to keep track of are also different colors than the sketch. idk :v