So, if you buy fountain pens because you like having them and not because you need them, you can call yourself a collector, even though guys with 20.000 dollar worth of pens might not be willing to call you one of them.
I have moe than three shirts, socks and shorts, even more than three caps... I have more than 20k in FPs... I use them all... so this makes me a USER not a Collector. I beleive that collecting involves attachment to the collected thing. As a great pair of pants, shirt or cap, if you just use and care for your pens as something that will wear out and grow no attachment to it, then you are a user.
I purchase my pens to use in different ocations, for different purposes, no attachment to them. I have 15 FPs and have no use for a new one... If I want a new one, I will pass one to one of my sons for them to enjoy something they cant afford at this time.