That's funny. One of the biggest complaints about Big 5 is that it's too wishy-washy and doesn't have much to offer behind the scenes in soft theory.

For example the "generally people flip all their letters at the end of the work day" principle with four-letter type, or the way you can extract cognitive functionality from the four letters to explore potential cognitive gifts and blind spots.

I've arranged groups like you stated and found some interesting takeaways. Like one of the partners can perceive an annoyance with the work requirement and they become an effective interference machine team rather than a results-team. It's tricky because they are never really working in isolation and one partner will also be looking for outside opportunities and so on.

There is some interesting theory on this, which expresses that not only do some kinds of people work effectively together really well, but when they are also matched with the right project or field, they will carry the project out in a way that exceeds normal expectations. By definition they have more energy to spend and it replenishes quickly.