I'm pretty open. My face, my first name, the state I live in, and details about my life are all fair game for sharing. I will not publicly post any personally identifying information (last name, city I live in, college I go to), but I'm usually totally fine with sharing that information privately with internet friends. The main thing there is that I control who sees it and can keep it just to people I trust, rather than leaving it out in the void for literally anyone to see.