What, no beastie in the loch?! :P It looks very good! I'd agree about the battlements needing something....maybe you could find a way to round off the corners, so they look more weathered? I don't think they're too regular exactly, but all the edges are sharp, as if the stone was just cut, and even the broken parts are sharp-edged as if they were just cracked off recently. Time and weather should have softened it more. Otherwise, terrific pic!