I'm curious if people think their physicality influences their aim and preferences like sensitivity, mouse weight etc.

Height, arm length, gender, hand size, muscle mass, fat %, fast twitch/slow twitch, reaction time are some of the characteristics that come to mind.

Bumping because I think this thread could end up being interesting.

Hand size and mouse will definitely affect grip. Not everyone got to handle every mouse shape available before committing thousands of hours of mouse holding.

Muscle and grip will also affect perceived mouse weight. How you hold and move the mouse can affect how heavy it feels.

Reaction time is a no brainer, you will adjust and track closer to real-time.

I think most of this is negligible though. Skill, experience, and copying other peoples settings affect aim and sensitivity preference far more. I think most people copy others without finding what works best for them.