Collecting items

As I think about my desk, one drawer is filled with fountain pens. I collect fountain pens, I love writing with them, changing colors in the ink, swapping them out for one another from time to time. They are like little individuals – they have their own feel, how they write. I truly mourn their loss if I lose one.

How does a collection hobby fit into the declutter framework. Can I love my reason for having every one of these pens and hold on to every one of them?