I started this group because I only recently learned that it's OK to be an introvert. Up to one half of us are, and it's a perfectly natural and valuable personality type. That may not be news to everyone, but it came as a revelation to me. Introverts are not antisocial, but we are differently social. Do you prefer a relaxed atmosphere over a noisy, raucous one; coffee shops over bars and clubs? Do you dislike small talk, but enjoy substantive conversations? Would you choose a museum over a spor …