I have met 3 arch users irl.

One was a hacker man kid (unironically one of the best developers I've met), messy hair, hoodie but other wise a regular kid.

One was his friend, jock kind of kid. Not necessarily good at programming but he did program and was enthusiastic about it.

Another is a CS major, 6ft tall and fit. Not much else to say about him. He studies CS, you can infer whatever else you want.

And obviously me (btw), not that I've met myself.