Drawing A Face

It's been a while since I draw a human face, until I have decided to sit down and do it again last year, based on a bw image of a friend. I used a mechanic pencil (and rubber), on simple office print paper (about 15x20 cm). These are normally available when I am at work, and I often draw, though mostly only things that others would not recognise or make no sense at all, except perhaps in some far corner of my mind, like the image in one of my first posts. Nevertheless, sometimes I get the motivation to make something that actually expresses something out of me in a more approachable fashion, or just simply create the likeness of something to see if people recognize it. A human face is an ideal subject for that, but then it can be a very hard combination of 3D shapes one has to project to 2D. I had a somewhat easier task here since I worked with a photo. It is still a challenge to give a perception of light and shadow, which defines a nose, or in the case of such a smooth face, the presence of a sublime smile. After scanning, now that I can see the drawing in a much larger size than the original was, I can also discover some places of possible improvement. First of all, I draw faintly, I always did. Somehow I find faint things more attractive, but it may also be true that stronger lines are harder to control. I am not sure if I want to change this, but seeing the scanned image, and comparing it to the original, I can only see some of the subtler details if I tilt the screen due to the stronger brightness. I normally start from an eye, and measure distance in "eye-widths". I started off from the left eye this time, and I can sense a slight disproportion looking at the right, though this may be due to the fact that the head was slightly turned on the photo, which I tried to mimic on the drawing. And how to draw the hair when at moments it appears to me that each piece points to a different direction, in a somehow naturally arranged disorder? All in all, I am not sure if I served full justice to the qualities of the model... but it was recognised, and I should not disappointed at least about this. Maybe next time I will experiment with a 3D model...