The TV show "This Old House" did a kitchen planning show recently. They had arranged big cardboard boxes in the kitchen space and drew in spaces for cooktops, sinks, etc. and wandered around thinking about it. They brought in a cook, who looked around and said that he would eliminate about half the cabinet doors, so he could see and reach for his most-used pots and appliances. He also argued for a center island without any insert - no stovetop or sink, since he found workspace most important. For myself, I'd want counterspace near anything (microwave, oven) that yields hot food.