This is THE distinction between hoarder and collector, as I am sure you know.
Hoarding is broken into groups by some researchers. For instance, there is sentimental hoarding. People attach emotion to an item and can't let go. There is also instrumental hoarding. People cannot toss something because they swear it is useful!
You could be at risk. But remember this, perhaps this could even scare you straight, once you become a hoarder your odds of ever overcoming it are so incredibly unlikely. You have much better odds of getting hooked on heroin and kicking it than you do getting hooked on hoarding and kicking it.