For this family, the triangular island tried to do too much at once, with a cooktop and prep sink consuming most of its surface. The single level also made it difficult to separate the cooks from the diners. See next slide. 

Drury Design  
Glen Ellyn, IL
www.drurydesigns.com

Janie Petkus Interiors  
Hinsdale, IL
www.janiepetkus.com