Strengths and weaknesses, both. More than being advantageous or disadvantageous, I believe having both just makes for a mixed experience.

It also makes it impossible to answer "do you usually...?" type questions directed at introvert/extravert tendencies. I don't usually anything. It depends. On what? Ask me at that moment and I'll tell you what on.

Right. You know yourself and you know yourself in the moment but for an overall picture, those thing are going to go one way sometimes and one way some other times.

These personality types do not have hugely good science behind them. THey
are a fun way to see ourselves -- usually the way we already see ourselves.
It does give us something to work with sometimes.
Like I can remind myself that I am in Introvert and therefore I can cut myself some slack when a situation comes up.
Either I will stay home (so to speak) or go and give myself allowance to sit in the back, show up late, not be chatty, leave the moment I want to leave, and so on.


M

I believe the Myers-Briggs is based on Jung's model.... a theory not proven and indeed possibly not provable or disprovable (by definition unscientific).

I find the Myers-Briggs' types useful as abstract points of reference. All of us can relate to the concepts in some way even if no person is exactly one type. Think of Plato's forms.

The terms we have for these concepts further provide a communication currency so we can tell each other how we experience ourselves and the world.