Photographs are fixed perpendicular frames. They only have so much area in which to lay out a scene. We can't get all of what we see into the same frame (although I feel many of us try!), Photographs are not real. They are interpretations of reality. A photograph is a 2D representation of something, framed within a rectangle or square. Rectangles don't exist in nature - the world is not a rectangular thing, so we should understand that when framing the world through a frame, we have to use some kind of notion of balance in our compositions.
Simply composing your images like Picture 1 because you like a lot of sky, does not help the composition, and as explained, creates an imbalanced bottom-heavy composition that suggests everything is sinking to the bottom of the frame and beyond.
In Picture 2, I have corrected the imbalance by pushing the camera south (towards the ground), and therefore moving the mountain and tree towards the middle of the image. But although this is a huge improvement on Picture 1, it still feels imbalanced to my eye. And here's why. a good framer will never place images right in the centre of the frame, they will leave a little extra room at the bottom of the frame so the picture sits higher up in the frame. They know that when you do this, the eye perceives it as being central. They also know that when you put something in the middle of a frame, it is perceived as being lower than central. So even in Picture 2, the overall balance still has the suggestion of sinking.
In Picture 3, I've moved the horizon further up the frame and as a result, I've also heightened the distance between the branches and the mountain to give them more 'breathing space'. By placing the horizon a little further up the frame, I feel I've given the image a more 'uplifting' feeling and it also feels more centred. As discussed in the framing example above, images tend to feel more centred when they are placed higher in the frame. So too is the same thing evident in photographic composition: by placing the key elements of a composition higher in the rectangle, the image is given a more centred feel.
Before I close on this post today, I would like to show how I feel the viewer interprets the above three images by the diagrams below. The black circles indicate where the eye tends to be drawn to, and consequently, illustrates the 'weight' of the image.