Very nice to look at Jeremy, especially the detail and composition in last one. I wonder if it's also the case that the eye spends more time on images with horizontal variety, instead of verticals. I seem to like those more.
"All shot with a tripod and a D700 with shutter speeds of 1/8 - 1/20th at f18 or f20 and ISO 1250." - I don't think you were using the overcast skies for light?