Rembrandt Van Rijn completed at least 90 self portraits; paintings and etchings.
The first one Rembrandt adds interest by placing the head a bit off center and looking slightly out. The highlight on the right side keeps the viewer focused within the painting.
The next painting also has the light coming from the right side but the head is centered and looking toward the viewer. The lighting adds intrigue.
The last portrait has the lighting coming from the upper right. It is interesting with the mystery figure appearing on the left.