I took the shot from a window with defuse lighting. I have a person take most of my self-portrait. I mostly took them near the window to get a high contrast and the last two were taken forth away from the window to reduce the contrast. I like how the last two has a different mood.
Four of your photos are with short light which we will discuss this week.
The one with front light is the most flattering though you are a bit low in the frame.