An island in a kitchen can be the gem of the entire room. It doesn't have to be just a rectangular box in the center of the space, but rather a highly functional addition that enhances the overall design.
Islands can match the overall design or offer a contrasting design element such as a white island in a natural wood kitchen or vice versa. Other design elements include shape (rectangle, square, semi-circular, L-shape, etc.) as well as tiered designs which is an island with two or more levels.
Functionally, they provide additional work space, an eating area, storage, and appliance placement (location for a stove, sink, microwave or dishwasher). Custom islands can also include wine racks, small dining tables attached, a desk and even offer space for plants.
If you don't have enough room in your kitchen for an island, many of the above mentioned features can be incorporated into a space saving pennisula.