one thing about stickmen is that because it is such a minimalist way of animating, it is actually really good to show that you have good knowledge of body movement. I suppose with 3d anim it is a bit different since once you set up the joints, those are the limit, but back in the days when most animation was done by hand, the early test anims that the senior animators got their jrs doing were with stick figures, so they couldn't hide sloppy anatomy and understanding with clothes.