Suppose your friend's daughter was having some trouble and needed a place to stay. You haven't met her before, but figure you can help out, you've got some extra space. You know your house isn't as clean as it could be, and you should really get around to that, but there's just never any time, and it's just going to get dirty again anyway.
How would you respond if your house guest proceed to clean and reorganize your house? (Not like, massively reorganzing, but things like alphabetizing the movies, organizing the books by genre, etc.) Would you be grateful, offended, something else?
Would it change your opinion if you found out your guest had OCD or something like that?