For this project I used director Alfred Hitchcock as reference. The most important parameters I think would be needed would be eyes, mouth and cheek controls.
Hitchcock has kinda loose fatty cheeks that can be pulled back a large amount when he smiles. He also has a large flabby neck that would need to deform with his jaw movement.
His raised eyebrows are iconic and those play a large role in his look. He also has a very iconic silhouette.
His eyelids need to be built in a way in which to allow the character to glare into the camera.
