So if we call them perspectives, what do we use to define our personality? Saying I'm a dominant irrational who extraverts feeling, will give someone who knows the lingo a pretty good idea of my personality archetype. Sure, we all have the basic mammalian limbic system underneath it all. We can all see, hear, taste, smell, feel, anticipate, react, adapt, etc., but those are primitive instincts such as animals have and as you say below, it is autonomic and instinctive. It's on top of this that we write our personality, and that we have preferences or perspectives, if you prefer, where we tend to differentiate behavior from others. There is no way I am very much S and I never have been. I have (barely) enough to survive, but even that might be debatable without someone to look out for me.