I'm sorry that I'm not that active the past months, I'll try to get back in the groove for there is much to tell. I answer the questions of everyone in due time too.
I'll continue where I left off. Observe this loop:
When placing loops, always try to envision how the underlying structure looks like and how it should move. Poles offer some isolation for your model in the sense that loops could stop at poles. The advantage of that is that your model will stay light and when animating, you are not pulling a loop that is going in areas where the movement doesn't agree with the placement of the loop.
This one is a no brainer because there aren't any facial muscles that are attached below the eye and travel across the side of the face and under the jaw. Besides there is a funny curve in the edge loop. If you want to curve you loop, let a pole do the job. There maybe more of such loops in this model and I will delete them assuming that you can guess the reason for deleting it.
A little bit better. Still... :\
(to be continued.....)