All I can say is I have a LOT of fabric. I'm not quite sure I'd put myself in the hoarder catagory yet, but I bet some people would say I'm close. I have almost two whole walls full on shelves and several large boxes under my sewing table. I can't even put the leaf down if I wanted to. Not to mention the tubs scattered here and there. So I'm pretty sure you aren't a hoarder yet. But give it some time. You will get there.
Oh, and what about thread? That's another story.