You wouldn't happen to have EXIF data on these would you? I'm primarily interested to see what aperture values you were using, and maybe get the thought process.
The reason why I'm asking is that you seem to play around with it quite a bit, and that changes the appearances of your images. For example- picture 2 could have one of 2 things improved (but but not both). A slightly more open (smaller number) aperture would get rid of some of those spots in the background, and give you a better bokeh. On the other hand, a smaller aperture would allow for the handle of the saw to be more in focus, and give you a more complete image. The same could be said about Picture 4, as the domino is out of focus. In this case you're trying to show the curtain shapes in the background, so I'd probably clone out the domino.Picture 3 is spot on. You probably used something sharp like f/8 or f/11, which is what you should be doing for a similar "flat image." This doesn't work quite as well for the mill, however, as the tree on the left and the wall seem...well... flat.
Overall your composition is there, just need some practice with some of the technical crap. Good job.