The first month's sketchbook challenge is something that is Highly Prized.
I do highly prize my family, but I have not gained the proper drawing skills to be able to draw a family member. I tried that once years ago using chalk pastels on fabric. You can see that here.
I let many a years go by and never continued learning to draw faces. So that is what I consider Highly Prized, starting again at drawing portraits.
I plan on focusing on eyes first, then the nose, mouth, hair, etc. So hopefully by the end of this year I will be really good at it.