Day of portraits I think it simple but I was mistaken

  Every day I trying to learn something new. Today it's a portraits :-) I don't really understand for what people like portraits. It's just a redrawing of your facial features. It is so simple I tnink. Until you try you do not know.  

I decide to draw a portraits. It turned out it's not so easy. Even the theoretical knowledge of facial proportions did not help me. See what happens. It turns must also be able to catch these very features.