Personalities can be a tricky thing. I mean, it is hard enough to know, appreciate, and monitor your own. For instance, (according to a recent Myers Briggs online test) I am an ISFJ. Some of these qualities have changed since I was in college. Until today, I would have told you that I was a Thinker, not a Feeler. I have always teetered on the line of Extrovert/Introvert as well.
It's just plain complicated. Knowing yourself, how you act, think, feel, function, and live day by day can become quite like a labyrinth.
Then throw another person in the mix: a co-worker, friend, relative, or spouse. Then watch the fireworks fly! If you think knowing yourself is a struggle, try combining knowing yourself with trying to get a handle on the other person! Complete mystery.
Even though it can be a struggle, it is also one of the greatest gifts: knowing yourself and being known by others.
People all across the earth crave this very thing. They want to be known. Truly. Honestly. Genuinely.