If you don't have a Jack in your life, well, let's just say you're lucky. Jack is arrogant, yet kind as well. They are sweet but self-centered, and oblivious. They think they are, how do I put it, "...all that and a bag of chips." They like to make comments on their appearance, and like to boast about how "awesome" they are.
"Jack, could you be anymore arrogant? You're exactly like Simba!"