I've noticed...that, as a 9 on the Enneagram, I have a constant low-grade scanner that is monitoring both threat and opportunity. As a default, I am not too focused on either, but am aware of both. I don't tend to obsess over possible threats, but I do watch for them, especially through a lens of threat to my perception of harmony. On the other hand, when I am confronted by dis-harmony, I tend to look for opportunity.
In other words, the respective ends of my 'scanner' are 6 (on the threat end) and 3 (on the opportunity end). And, I most often live in the middle, of the two.
I'm not claiming this is a great way to live...but, it is the one I seem most often familiar (comfortable?) with.