[rwnspace]

I've been thinking about this recently as it pertains to changes in my own life... I've been training myself to be less addicted (in the general sense), and I've noticed several aspects of my 'personality' flip like a switch, in terms of preparedness to deal with uncertainty, fitting extroversion or introversion to the context, sticking up for myself but being more pragmatic in other ways.

You might (probably correctly) say I'm coming out of a depression through my own CBT interventions, though I'm pretty sure I was already on an initial upward trend because of positive environmental changes, so chicken/egg.

What you mentioned about anxiety triggered a lot of associations with Sapolsky's writing on stress (Why Zebras Don't Get Ulcers etc), and how bodily aspects interleave with personality tendencies... I do wonder sometimes if a very 'Cartesian' view of personality is problematic pragmatically and philosophically. I.e., 'I'm just an introvert' can be reached by a bad diet or untreated psychiatric symptoms or low social status or just plain old preferring fewer social contacts, and so it's difficult to really /do/ anything with that conception of onself.