Your new bath should be comfortable and easy to use by anyone. Take into account the age, height and needs of everyone in the household as you make bathroom design plans.
Also consider the future needs of you or others to "age in place" at home, such as lower-height counters; vanities built at a higher height to reduce bending over a sink; cabinets with pull out shelves to eliminate bending and reaching; and cabinet doors with easy-to-open handles.