Sadly, it runs in our family too.
While I don't have things piled up to the ceiling or anything, I have to continually battle clutter, and have a number of 'hot spots'. My brother affected his kids' lives with so much hoarding, they moved out as soon as they could. One son built a sort of 'cabin' on the property (acreage) to live in before he moved out on his own. The main house and cabin is now filled with stuff. My brother very much enjoys things from the 'old days' such as heavy metal vacuum cleaners, etc., etc., ETC.(!), but he'll collect 10 or so, all of which don't work. And the list goes on. He moved in with a son for awhile, then bought another house because the first was unliveable. He's trying to go through and clean up the original house, but I see he is 'collecting' things that are going to his new house now.
He insists he doesn't need meds either.
I really hate being like this, but so far all the book reading, counselling, therapy, meds, etc., haven't gotten me to where I'd like to be.