I grew up with firearms. I had my first shotgun when I was 9 years old, and bought my first .22 LR when I was 12 (parents with me, of course). I got my first centerfire rifle when I was 10 I think, and started loading my own ammo accordingly (with strict instructions from my father). I got my first handgun when I was about 16, although I'd been shooting my father's before that.
I carried openly, and also in my truck, from the time I was a teen. So, when Arizona became a shall-issue state, it was only natural to also get a CCW permit.
It was no earth shattering decision on my part, for sure!