Very nice sides.
However the front, as other have said, is lacking.
To me, the visor is a bit high.
While on a human face, the eyes are more to the top, in a head, they are in the middle.
An illusion caused by our hair.
I don't know about others, but to me, such high eyes/visors have always given me a certain feeling of unease.
Might want to add more complex visor decorations, a mouth, more details to the front.
Just too empty.
I can't wait to see the third period head!