It doesn’t have to be elaborate to be luxurious; simplicity and minimalist design can be soothing and elegant. A simple spa shower may feature a hand-held and wall mount shower heads, a tiled niche for toiletries.
Built-in cabinets can be custom-designed to suit your master bath.
Windows can be located to let in lots of natural light; textured glass will allow for plenty of privacy.
Have the floor tile run partway up the walls to unify the area.
A calming color selection will encourage a relaxed mental state. Try having the master bath in a color one shade lighter than the bedroom to give a cohesive look.
Include a place to sit; remember photos of old dressers with large mirrors, drawers to each side, and a chair in the middle? They knew how to fix their hair and apply makeup – sitting!