1) I don't really know what the main subject it, there is nothing drawing my attention.
I think you wanted just to photograph the toys/clothes but the angle means most of the photo is out of focus, therefore I am supposed to be concentrating on the in focus area, but there isn't a subject. I think the photo would have worked better taking it parallel to the display so the whole lot is in focus, or alternatively getting in closer and fidning a particular subject to focus on.
2) The foreground/beach is just too dark for me and the composition is poor. The Horizon line is slap bang in the middle so bothe the foreground and sky are given equal wieghting but I don't think this photos wants that kind of compositon. Placing the horizon in the middle works well when you want to emphasize symmetry, for eample a reflection in a lake. As it is in this photo i don't knwo what the main subject is supposed to be, is it the sky or the beach/sea. The latter is too dark so I think the sky is supposed to be the subject. IMO, cut off the bottom to have just a small amount of the beach and sea and change the aspect ratio to 2:1.
3) Excellent. See how putitng the water/foreground well to the bottom has emphasized the sky as the important subject and the sea is just for framing. This is a classic compositional technique (4/5th rule). The colours and lighting are very pleasing. I would try to remove the vignetting. I would also think about getting a tighter crop and removing some of the left hand edge and top of sky so that the silhouetted rocks in the background are more prominent and the great colours are enhanced. The left edge is a bit of a dead space. this will also help remove the symmetry, that big band of red-pink cloud/sky will get shifted off center which should make a more pleasing balance.
4) excellent again. Really nice colors. Compositionally this is the strongest for me, good useof leading lines of the edge of the boat drawing the viewing to the image center where the bright sun is, which will also draw focus. I would try to lift the shadows a bit of the boat but I think leaving the upper deck and men as silhouettes works well. I would also think of cropping a bit of the top of the sky away, again to balance the picture more.
Lots of potential in the last 2, rally like them as they are already but a few tweaks could bring the best of them out.
Shilin Shoping by jon.hills88, on Flickr
Its always Sunny Above the Clouds by jon.hills88, on Flickr
Painting with Clouds by jon.hills88, on Flickr
There Goes The Sun by jon.hills88, on Flickr
