Space and Design are Important : You need around 3 feet of walking space around the island unit, and you must be sure that the drawers and doors in the cabinets have room to open. If you keep to the 36 inches then you should be OK. The only dimension that must be stated is that of the counter height. Ideally it should be the same as the rest of your kitchen units. If not, then it is not a disaster, but can be disconcerting when you are working on the various surfaces at varying heights.
For example, we have seen islands of concrete when the rest of the kitchen countertop is made of granite or another material. We have seen a black island used as a nice "dividing wall" to keep the kids away from a white kitchen.
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.
Kitchen islands that are properly designed and carefully structured can usually help improve the efficiency of your cooking and to enhance the décor of your kitchen. Kitchen isles design these days are so varied in their style and functions that making a kitchen isle yourself can be a fun-filled activity and most importantly a design that is built in accordance to your need and satisfaction. One can design kitchen islands according to their needs and if one is skilled in carpentry work one can also build them by hand as Kitchen Island can be built based on its core modular structures (counter top, shelves, cabinets and doors, stools etc).
small kitchen island and bar
small kitchen island cart
small kitchen islands with seating