If you have a suitable wall...in the hall maybe, or study, or anywhere else....then bung all the plates up on that one wall. They can look very nice hung like that, all clumped together, rather than old fashioned they can look modern and interesting. Same with the pictures, look at how you hang some of them in a completely different way...perhaps three or more hung underneath each other.
Failing that, divorce him and do it exactly how you want ;)
I hate fuss and clutter, fortunately himself doesn't care two hoots.