Before you install a backsplash, try "walking" tiles up a wall to make sure you aren't left with a thin sliver where the tile meets cabinetry. Hold the tiles against the wall at the bottom of the backsplash area and move them hand over hand up the wall following your desired pattern until you get to the top. You may find you have to start with a half-tile at the bottom to be sure at least a quarter-tile fits at the top.
Heath Ceramics' 3-by-9-inch Concave Diamond and Bowtie Shaped Tiles can be used to create an interesting pattern; just plan carefully before installing them. About $77 per square foot, Heath Ceramics