Are you an internal processor or a verbal processor? Do you think before you act or act before (while) you're thinking?
Internal processing = need time alone, in the quiet, to think through past events and future plans, and everything else in between.
External processing = need to verbally express with another or others to think through past events and future plans, and everything else in between.
Are you in the left-hand side of the box? You're most likely an introvert. And you probably have a hard time understanding those in the right side of the box -- how could they possibly have so much to say? Do they ever consider their actions before taking them? Could they ever be quiet for just ten minutes? You probably tend toward a certain level of arrogance in the level of self-control you exude and your ability to give a calculated and mature response.
Are you in the right side of the box? You're most likely an extrovert. And you probably cannot even fathom how the left side even gets anything done, let alone has any fun. You wonder why they are so quiet, reclusive, boring, and unengaged. You probably tend toward a certain lack of tact because what comes out of your mouth is in time with or ahead of what you're thinking.
The two descriptions above are somewhat "tongue-in-cheek" and obviously HUGE generalizations. However, from my limited observation on life and those around me, I think some of this awareness can help with our own enjoyment and understanding of others. This can then lead to knowing how to better accept them and love them, while seeing and accepting the differences between us.