Bathroom - overall design is too modern, but like the idea of an open shower with tile feature wall & LOVE the tile shape & color (tiles are hand-glazed scalloped/fish-scale blue tiles from Urban Edge Ceramics in Melbourne)
Put a gallery wall in an unexpected place. Like over the tub in a bathroom in this photo from The Fashion Medley. In your laundry room. In your master closet. Why should the joy of a gallery wall only be for those who enter your common rooms?