Introvert.
"On the surface, introversion looks a lot like shyness. Both limit social interaction, but for differing reasons. The shy want desperately to connect but find socializing difficult. Introverts seek time alone because they want time alone. An introvert and a shy person might be standing against the wall at a party, but the introvert prefers to be there, while the shy individual feels she has no choice.
It’s often possible to spot introverts by their conversational style. They’re the ones doing the listening. Extraverts are more likely to pepper people with questions. Introverts like to think before responding-many prefer to think out what they want to say in advance-and seek facts before expressing opinions. Extraverts are comfortable thinking as they speak. Introverts prefer slow-paced interactions that allow room for thought. Brainstorming does not work for them. Email does.
Introverts are collectors of thoughts, and solitude is where the collection is curated and rearranged to make sense of the present and future. Introverts can tolerate-and enjoy-projects that require long stretches of solitary activity. Extraverts often have to discipline themselves for bouts of solitary work, and then they prefer frequent social breaks."
www.psychologytoday.com/articles/201008/revenge-the-introvert