I use my full name professionally (in writing) because I think it looks appropriate, but in actual (verbal) use, I barely pay attention to what people call me. My first name feels like a cypher to me. I don’t relate to it at all. In fact, I often miss it when people call me by my first name. They probably think I’m ignoring them. After I hear my name a couple times, I wake up and think, “Oh right, that’s me”.
I relate much more closely to my nickname, which is just an abbreviation of my last name. Old friends call me that, my wife calls me that.
I relate most closely to my parenting name, which is an interpretation of the Chinese word for “father”. My daughter calls me that (‘natch), and my wife has taken to calling me that too.
If no one ever called me by my actual first name ever again, i’d be okay with it.