A perfect reference for your face sculpts.
If you struggle with drawing or sculpting faces, FlippedNormals' Anatomy Bust is exactly what you need. It is a great practical anatomy resource that provides a detailed and accurate model you can use as a reference and modify to fit your project.
You can load up the model in 3D software, use one of the 72 supplied images to find your angle, or even 3D print it.
Anatomy Bust is supported by any 3D software that can open OBJ or FBX files. FlippedNormals also supplies the original Ztool file, which can be used in ZBrush directly, and a Blender scene with Multires set up.