Nice shots. The first is definitely my favorite. The tree stump creates a very strong moody shape--in fact I think the shot would work well cropped approximately square showing just the bottom half of the photo. The second is a nice composition; I have the sense that a little work on local contrast, particularly in some of the foreground areas, could add a lot more feeling and depth to the shot--by enhancing the detail in the snow covered path, it would more strongly draw the eye into the frame. In the third, I am troubled by the sameness of texture and tonal range of the snow on the mountain and the cloud patterns in the sky. I wonder whether somewhat different settings in Channel Mixer for the B/W conversion would emphasize the differences between ground and sky, but perhaps your intention was the opposite. In number four, the water adds little and should be cropped to a narrow ribbon. Again I think some work on local contrast could give a lot more appeal to the image, as by emphasizing the highlights and dark rock on the mountain and by giving more definition to the buildings in the foreground. Hope this helps.