actually i am glad that people dont pay attention and just let head shapes sort of float around randomly.
otherwise we could get the madness that has befallen dog breeding, where they mess with head shape so much that they cannot properly breathe, or thermo-regulate, or chew. in some dog breeds the head is too small for the brain on a regular basis.
nothing wrong with paying attention, if its just to make sure the BPs have a healthy and normal head shape.
i wonder if weird head shapes may be somehow linked to inbreeding and can be avoided with outbreeding? when you try to hit a recessive or super via inbreeding, you will also hit recessives and supers in all other genes of the snakes genome, including those controlling head shape.