There is a great meme doing the rounds which claims it isn't hoarding if it is books. I have a lot of sympathy for this viewpoint and confidently expect to add to my own hoard courtesy of the book room at The Writers' Summer School, Swanwick, which is my base for a few days.
I also love story collections and have done from an early age thanks to the collected fairytales Reader's Digest brought out as a two volume set a long time ago.
I'm not unbiased given many of my stories are in collections and I often edit them for others. I love the mixture of tales in these and to be able to dip in and out of the books as I wish.
I often read them in between reading novels. I like to mix up reading the short and long forms. A well curated collection is a joy to read.