Do you have a single username you feel attached to?
Or do you like to use different names for different occasions?
Edit two and a half days later:
Thank you all for answering my question! It was so interesting and fun to read all of your responses.
I really appreciate you for taking the time to write.
Teenage me used the same or a similar username everywhere, but avoided ever mentioning his full real name.
Adult me realizes that this is stupid. Either I want people to recognize me from one place to the next, then I use my real name because why would I not want people from real life to find me too? Or I want to be anonymous, then I use a username no one from anywhere else will recognize, like I do here.