Welcome, introverted sisters. For extroverts, the holiday season is the best time to socialize. If they live far away from where they grew up, the holidays provide the perfect time to travel to their hometown and catch up with all of their old high school friends. Extroverts with high social batteries can handle nosy relatives with ease and tend to enjoy the overwhelming amount of family functions. Those who are hit with SAD (Seasonal Affective Disorder) during the summer months also love the c…