There is nothing wrong with you. You sound like you have reflected on who you are and found what works best for you. Your personality is one of an introvert. However, we live in more extroverted world where introverts tend to feel different. Here is a book that I recommend to you - "The Introvert Advantage: How to Thrive in an Introvert World" by Marti Laney. Don't change who you are, embrace it! Good luck to you.