Is it fine to have curved lines for the top of the head?

Hi Jonathan, as I was following along, I discovered that the poles caused my head to look slightly blocky. In order to fix this issue I ended up having the top half of my head follow the curves along the side as shown in the picture. The result was a nice smooth rounded head that looked natural. Would this geometry be a problem? I am comparing my geometry to yours, and your’s had straight lines for the top of the head.