Character Design: Experimentation with Heroine Faces

After I'd narrowed down the hairstyles I thought were most suitable from my previous thumbnails I went ahead and started playing around with proportions and shapes of my heroine's face. I'll be honest and say it started off pretty badly with #1 but I stuck with it and with the help of my trusty blue pencil lining in faint details to see whether it would work I've created 4 completely different faces which considering I've always struggled with this I'm very happy with!