I've had a recurring thought over the last week that the way in which we are reckless might be a hint as to what our stacking is. I'll try to keep it short for once... this is my thinking:
Blind spot recklessness: Real recklessness; you are reckless in this area because it doesn't even cross your mind. An so-last might commit big time social faux-pas, an sp last might often sleep with their contact lenses in, get black-out drunk, etc.
Secondary instinct recklessness: although it can be quite daring, this is more of a calculated recklessness. In fact, it might be the illusion of it; they often know what they are doing. For instance, travelling solo at a young age; I've done it yet I carefully planned every detail, was very careful. Or, doing some kind of "risky" sport or activity: someone descending a hill on a bicycle going 60-70 km/h, yet being completely aware of the dangers, constantly scanning ahead of them.
Anyways, just a thought. Do you think it has legs?