A bathroom is the only room in the house where the decorating has to survive standing water, steam, and a 21-inch clearance rule. Start with those, not with the paint chip.
Most bedrooms that feel off are not badly decorated. They are badly measured: a rug 2 feet too small, a nightstand 6 inches too low, one ceiling light doing the work of four fixtures.
Your cabinets already decided the height of your backsplash. What is left to choose is material, termination and how the range wall gets handled, and that is where most kitchens go sideways.
The decisions that determine whether a bathroom remodel is good get made in the first week, before a single tile is chosen, and most of them are dimensions.
Moving a toilet 18 inches can cost more than every tile in the room. Knowing which changes are cheap and which are structural is what separates a good bathroom from an expensive one.
Most desks are not messy because of the person using them. They are messy because there is nowhere within arm's reach for the six things that get used every hour.