I certainly like the right side - a winner. Left, um, maybe also try to angle the rocks a la right side? The shape of the path: blunt up the top corner a bit, the needle tip looks a bit unnatural to me, or plant something at the very top.
Light sand and AS is a PITA, but I love the look.
Courtesy * Integrity * Perseverance * Indominable Spirit * and Self Control
Tenets of TKD