I do like where the third one is going. I can clearly identify a few objects that are silhouetted against the bright sky. Catching it in a mirror just improves it. Could try cropping it tighter or maybe just using a partial view of the mirror to get a more detailed look at the tall tree and keep people guessing a little bit about it being in a mirror? Just some random thoughts that came to mind when looking at it for a while. It just seems that the image has a lot of black area.

If the subject of the first image was intended to be the cloud in the sky then perhaps a longer focal length, or cropping, would isolate it better? I am not seeing a shape in the hill that is strong enough to hold my interest for very long. Yes there is a suggestion of a woman's hip and arm along her side but the jagged edge of the trees works against it.

Hope that at least something in this rambling might be of help to you.