[comdpa]

Man, that left arm is as straight as a die,,,

Is this something that comes natural or did you develop it?

It appears that your left elbow (funny bone part) is pointed toward the plane line at parallel, whereas mine would be more inward toward my body.

The left arm is dead straight and frankly I don't like it.
I prefer a slight bend in it.

That left arm is actually a bad habit from when I was learning golf as a kid. The pro said "keep it straight" and that was what I did...