Bizarre question, but here goes:
Does everyone have what I’d have to call a “dominant” fretting finger? One which you default to when it comes to starting melody lines, or around which you orient your way around the fretboard?
For me, it’s my middle finger, because I organise my entire conception of the fretboard around the idea of a middle finger reference to play scales, even if I’m starting a scale shape with the index. Admittedly my knowledge of the fretboard isn’t perfect/where I want it yet, but it’s how I think of things.