Face Study Sketching

I do a lot of face studies when I sketch, more than drawing anything else. I like drawing people from movies and television shows that I watch but it is also interesting to draw faces that I'm not familiar with because then I will be less critical of my work when I do not know the face as well. I also practice drawing some of my friends. I have done a few sketches on my computer using my Wacom tablet, but most of my sketches are on paper in pencil.