According to a Dorothy Rowe book I read years ago, everyone's deepest fears can be boiled down to 2 scenarios depending on whether you are an introvert or an extrovert. These fears are so strong that you fear you would cease to exist if they were to come about. For an extrovert it is the fear of being all alone in an empty universe with no hope of ever meeting another living being again. For an introvert it is a fear of loss of control over the outside world. If you suddenly lost control over every aspect of your life - where you lived, who you lived with, what job you had, what and when you ate, when you slept, when you had quiet time - if all this were to change on a daily basis, with no hope of it ever stopping, an introvert would feel they would almost literally explode. Apparently secret service agencies around the world key into this when interrogating suspects - extroverts kept in solitary confinement whereas introverts made to feel utterly disorientated by eg someone interviewing them for an hour then coming back two minutes later acting as though this were the first time they had ever met them. As an introvert I can relate to this - the disorientation techniques would be far worse for me than solitary confinement. How about you?