I hoard shoes. Especially boots. I always think I need new shoes when the styles change after a season or two, and then I end up with tons of shoes that I never wear because I think they're out of style!
I have a hard time getting rid of shoes, too. So I am officially a shoe hoarder!
ETA: Totally unrelated, but I also hoard cards. I can't get rid of cards that have been given to LO or DH and me because I attach sentimental value to them. I still have every single card that was given to us for our engagement, my bridal showers, our wedding, LO's shower, her birth, her baptism, etc. I just need to throw them away!!!