Nicknames on Habr and in general.

With one colleague, we decided to conduct an experiment in which we are trying to figure out how people choose or create their own nicknames, and to understand whether there is a rule / desire / psychology / affection behind this.
Let it be a small habraexperiment.

I would like to ask Habrovtsev on what grounds you came up with a nickname.

If there are those who want to tell about their nickname, we will be grateful.