The highly sensitive [introverted] tend to be philosophical or spiritual in their orientation, rather than materialistic or hedonistic. They dislike small talk. They often describe themselves as creative or intuitive. They dream vividly, and can often recall their dreams the next day. They love music, nature, art, physical beauty. They feel exceptionally strong emotions–sometimes acute bouts of joy, but also sorrow, melancholy, and fear. Highly sensitive people also process information about their environments–both physical and emotional–unusually deeply. They tend to notice subtleties that others miss–another person's shift in mood, say, or a lightbulb burning a touch too brightly.

—Susan Cain in Quiet: The Power of Introverts