I love the brightness of white. It is so crisp and clean. A space can often feel large when white is used on the walls, furniture...as there are not a lot of colors breaking up the space.
White can be a cold color. Adding a touch of warmth, such as a piece of wood furniture, can "warm up" a mostly white space. There is not just one white. There are many shades of white and using multiple shades can also add warmth to the room.
If you have one piece or a collection with some color, it can really "pop" when surrounded by white. It really adds drama to a piece that may blend in or get lost in a more colorful space.
*Pictures from bhg.com.