The type of mortar joints you utilise will have a definite effect on your brickwork. A flush joint, a raked joint and an ironed joint (and variations on these joints) have their own characteristics.
It is well to remember that some joints are not recommended with certain types of bricks. For example, a straight arris (brick edge) brick — particularly a dry press brick — which tends to have a very sharp arris, should not use a raked joint, as any imperfections are highlighted. Because the arris is so sharp, the raking process can in fact damage the arris.
The mortar joint that should be used for this type of brick is an ironed joint, as these types of mortar joints will cover many imperfections and actually protect the sharp arris for the lifetime of the bricks.
Bricks of distinction made in the traditional way