by Thom Owens 　　  　　Third Rock from the Sun represents a bit of a musical departure for Joe Diffie. Though he keeps his basic honky tonk roots, he experiments more, adding more rock flourishes to his sound. Not all of his attempts are successful, but his ballads are frequently compelling. Nevertheless, it's a little distressing that he has only written one song on the album -- there's no reason for his well to dry up by only his fourth record.