These are really awesome. I don't even tend to like landscapes but these are amazing.
One thing you might consider playing with is boosting the contrast on a couple of them... I think it would be VERY much a stylistic choice and you may not like the result, but in a couple cases it would make some of the forefront objects really pop which I think would accentuate the fogginess of the other elements.
Most notably 5, and then maybe like 2.