Perhaps because I was a psychotherapist, the human form and face is what draws me (pun intended) as art subjects.
There is an interesting process in painting that mirrors our human progression: Start with a sketch, fill in the darks and lights, correct, edit, change colors, redo, undo, fill in more detail and continue with more redirection and correction.
Each of these studies has layers and layers of acrylic paint. Traces of the colored layers are still visible . . . like all humans . . .