Plus beyond introversion, controlling and dominant people make everyone suffer during pairing. Also, shy people non-assertive people loose any possibility of autonomy or independent decision making (they might or might not find it uncomfortable). People who see everything in absolutes are hard to pair with and find it stressful. Extroverts who still like to think about problems silently or explore issues cant do that in pairing either.

The human social issues related to pairing are many more areas then just introversion extroversion.