This is just a suggestion. You can chose either to use it or not. it's up to you.
One thing though, I really do feel that a pose should be as fluid as possible even just a simple standing pose. The human body has lots of curves (subtle and exaggerated). You can use it to your advantage.
Keep up the good work
[correction] the lower illustration's left arm is supposed to be foreshortened. so just adjust the elbow joint a little higher.