I have a middle name and it is Austin.
Unlike other people, I guess, I use mine a lot. In fact, everyone in my family calls me Austin except for my dad; I share my first name with my dad.
People that I meet in a professional sense use my first name.
People that I meet on a personal level use my middle name.
Very few people go from using my first name to my middle name; no one ever goes from using my middle name to my first name.