I discovered this interesting thing on GitHub. There is a trend of opening a repository called ama and allow for anyone to ask you questions.
A question is just an Issue on the repo itself. The person hosting the repo answers the question with a comment and closes the issues.
Since it is GitHub we are talking about, most questions are tech/code/geek related, but sometimes they are broader and you get to know the person behind the username.
Here are some of them that I found interesting:
Also, Sindre maintains a huge list of amas.