I find that having a desk up against the wall (as in the diagram) makes lighting odd, and creates a claustrophobic feeling (like you're being punished by being

I find that having a desk up against the wall (as in the diagram) makes lighting odd, and creates a claustrophobic feeling (like you're being punished by being made to face the wall or a corner). Facing away from doors is also psychologically unsettling, because people can sneak up on you without warning. This can cause distraction, as part of your attention to be pulled away from the task at hand by the vigilance of your subconscious.