One of my favorite bathroom configs is on the Lufthansa A340, where they have a lower deck (intruding into the cargo space) with a bunch of lavatories.
I also like the business class ANA 787 bathrooms with the washlet (bidet) toilets.
They weren't when I flew, but that was when they has just gotten deliveries and were still using them on domestic routes, so things may have changed. Now their domestic 787s are the most bare-bone interiors you've ever seen, without even IFE.
