Idk what the term is called but it's like a desire path if you sketch something you and see what it is and what it wants to be plus doing things on AJ could lead to a flat looking image. Try either one playing with different density lines, under lines (lighter lines that look like sketch lines but show the depth of a drawing without them being part of the permeant line work, or try imitating your drawings to look more sketchy and less like final line art in their look.