I guess I am not really the "collecting type". I have met people in my life who collect things, and when I meet them and they show me their collection/s I frequently think "I should collect something!" or "I wish I had something cool to collect." As a matter of fact, I remember when I was young, my (ISTJ) mother would encourage me to start a collection of something and I didn't want to.
I remember deciding to myself that I like having one of something. I don't mind owning something unique. I don't need to have a collection of it.
So that's how my thinking works, apparently.