I have too much stuff but not in the same category as a hoarder. My "stuff" (mostly art and scrapbooking supplies) is all put away in cabinets in my craft room. But I do find I have more stuff then I will ever use and I am trying to glean a lot of it out. It's hard to do though....I keep thinking someday I will use it - even if I haven't for a few years.
Since my stuff is tucked away, it has no effect on family member except to be used by my grandchildren when they come over and we do an art project.