Thanks for the comments!
I agree, the first is very strong, I was trying to get the ridges of the snow going diagonally across the image. My favorite at proper size is the third, the area on the right is really nice, like the sun shining through the layers of the snow. The last is very big, 12 images, almost 1.5m square, I took two rows of pictures with the bottom of the top half in focus so there would be a narow band in focus through the centre, it works quite well at full size. I took quite a few but they take ages to stitch together!
Thanks again for the remarks.