From the "for what it is worth" department.

Every so often, when I am doing my research, I think I find pretty good answers.

I found an interesting article about relationships here:

http://www.businessinsider.com/lasting-relationships-rely-on-traits-2015-11

And I would further describe a good relationship on what I call the X principle.

See the graphic below:

And I found another Walter Murch video worth watching:

There are several take-aways from this video.

-Charles