If you have a bathroom and it isn't simply a half-bath, chances are you have or could use some furniture or shelving aside from the normal bathtub, shower, sink and/or toilet. Everyone has different needs, different amounts of space, and different style preferences that will change the options available to you.
Almost all bathrooms have a mirror, whether it is a small one attached to a medicine cabinet or a large one connected directly into the wall. Consider this before putting lighting fixtures in, as mirrors are used to clean one up, and few things can be worse some mornings than trying to put makeup on using a poorly lit bathroom mirror.
Another constant in many bathrooms, regardless of who lives in them, is the overabundance of products required in this day and age to keep ourselves either clean, healthy, beautiful, or some combination of the three. Add to that the bathtub cleaners, toilet brushes, and things along those lines. There needs to be somewhere to put everything, or else every bathroom would look like a disaster area with piles of razors and toilet paper lying about.
Cabinets are a wonderful thing for bathrooms, and can be installed into corners, and under sinks, incorporated into mirrors, while others may opt to use stand-alone cabinets to hide their multitude of various bathroom supplies. The only thing that really matters in the end is the available space in your bathroom, your particular style, and the money you are willing to spend to make a bathroom more practical or aesthetically pleasing.
Whatever the answer is to making your bathroom your own, the options are wide and varied, leaving the possibilities open and likely to appeal to anyone in the market for bathroom furniture. All you need are some measurements, some design ideas, and the time to find exactly what you're looking for -- or perhaps as close as you can get.