Islands can "float" as well. Smaller islands used primarily as an aid in cooking or baking can be fitted with wheels and moved around the kitchen as needed to aid in cooking. Whether you consider a floating island will probably depend on what you have installed on the floor now, or plan to install (a soft wood will be nicked and scratched).
Maximize natural light by having windows and skylights, and keep kitchen wall surfaces light in color to reflect daylight. Custom kitchen islands work great by using pendant or recessed fixtures to direct light onto the kitchen island and other work areas. Electrical codes will likely require that electrical outlets be located on the sides of fixed kitchen islands, not on the top, to prevent electrical shock.
Another alternative is to have a custom island designed just for your needs. Kitchen design experts can help you come up with an island that will fit perfectly into your space and also have all of the components you really want to have. You can add a cooktop, a sink, or even a built-in microwave oven which can free up a lot of your counter space. Both a cooktop and a sink built into an island can help the cook become more a part of the festivities when you're entertaining if the island is used as a room divider between the kitchen and other living spaces.
Use kitchen island ideas to better understand how to create a more functional and comfortable kitchen. Using custom kitchen islands means having the most appropriate island for your home and kitchen area based on your kitchen space and your needs. Kitchen island ideas take us back to the farmhouse kitchen, even back to medieval times when a large worktable was used to do most of the preparation work.