Haha
Your apocalypse comment made me LOL over here!
Oh god... this is quite the question.
For me... I think I have an embarrassing number of diamond painting kits that I have purchased but haven't started. It's like collecting them is a thing... the same goes for spiral notebooks and pens. I have soooooo many and so many that have never been written in/with.
Also... socks and I don't even wear socks most of the time, but there are an embarrassing number of socks stuffed in cup holders, couch cushions, console bins, etc. My teens are animals and take them off when they get home from work and then I find socks everywhere.
And fur... with a golden and a maine coon, I could literally vacuum all day everyday and there would still be floof balls flying around. When we moved, the state under our couch and behind our headboard was truly embarrassing! wanted to die when the movers took furniture out of some of our rooms.