MBTI simplifies personality types into categories like introverted ... If Sheldon Cooper is a textbook ISTJ, then Penny has ESFP written all over her. The Entertainer is an obvious choice for ...

The Myers-Briggs Type Indicator, or MBTI ... resulting in designs to love for a lifetime. For ISTJ, “The Logistician,” a classic solitaire engagement ring with a Round Brilliant-cut ...