Hands and fingers (especially the fingers) are a bit small...
Its often a stylistic choice, paricularly with artists that draw or produce manga every single day who try to save time. Even from my own lowly level, I can make a head, hair, and body in an hour or two, but passable hand gestures takes me all day.
Kouji is one example offender of frequent french fry hands. Its not outright bad, its just that they don't have the time or experience to make them any better.