SHot #1 manages to gain a litle benefit from color, which clues us in to the low,low sunset and its weak, golden light's color temperature; the second version, in B&W, is a failure because the light is so flat, and the subject is flat, and there's no benefit to B&W...B&W is a net loss, a huge loss, in shot #2 versus #1. Even so, the light is low, low in the horizon, and the ground is FLAT...the color information is basically, all we've got for shot #1. Shot #1 has good overall balance. #2 has that odd, out of place curved line top left. Not working. I rate #1 a mild, mild success, and #2 a failure on all counts.
#3 is pleasing, although that black sky as deep blue metaphor feels a bit strained in 2015...maybe back off on the filtration to something a bit less melodramatic....or not...whatever you want to do. Compositionally, it's minimalist, but I think dramatic, and generally good. I find it logical and workmanlike.
#4 is an exercise again in minimalistic composition, with an interesting "tiered" approach....and a major,cloud-based diagonal (!! crazy!) in the center...and then the moon upper right, and far off to the side, exerting a lot of visual pull for such a tiny, object! #4 is an interesting exercise in balancing objects of vastly different sizes. I find it clever.
I ALWAYS find your photos interesting to look at. ALWAYS. Never fails.