There are a few common design elements that show up in most bathrooms. One is the use of tile, either on the floor or on the walls. This is because tile is easy to clean and maintain, and it can also withstand a lot of moisture. Another common element is the use of natural light, either from a window or skylight. This helps to make the space feel more open and airy. Finally, many bathrooms also feature some sort of storage solution, whether it's a cabinet under the sink or shelving above the toilet. This is important for keeping things organized and out of sight.