This is one I have lots of experience with. My husband and I have moved 13 times in 22 years and beleive me, it's crazy. The notio you keep less is not true and the notion it'll make you organized isn't either.
I have found against my resistance manytimes, it often is better to walk away and let my husband do his thing. Lately those have ben really good with ideas and floorplans that are better then what I'd planned. For the times it is not I take a deep breath, wait a while and if it still isn't god then I quietly reorganize things. Our conflict usually lies in the fact he is much taller, stronger and right handed so adjustments have to be made to help both of us cope.