Maybe I have a high tolerance for clutter because my mom's a clutter person, but I think the rooms in gurdymonkey's link would have to be a a lot more cluttered, before I thought the owner was crazy, or even just not very functional.
Looking at the link again, the rooms are full of stuff, but the windows and ornaments are clean, the books are stacked in low, non-leaning piles and there's no old food/dirty plates/animal hair visible.
Too many hobbies in too small a house, but not a nutter, IMHO.