Drawing head portraits is hands down one of the biggest ways I have leveled up my art. When focusing on a more detailed area like the face it is easier to see where your skill level truly is.
There is a lot of fine details and proportional issues that can instantly show you that there is things you may need to work on.
As I continued my growth with drawing face portraits I wanted to add my own artist spin on them and eventually came up with the Diamond shape along with the color background splashes to help compliment the portraits as a whole.
Its been really fun seeing how this collection has grown and how it helps my art direction with my larger and more dynamic pieces.