I'm not going to critique all of them. But to me 4 is the best.
The only two things I would be critical of is #7, the foreground is a little distracting. I have found it very rare that putting something in the foreground like that works. An interesting object, in focus in the foreground is good, "blocking" the viewers view of the scene with blurry plants/fences/trees etc is not usually.
Also 3 would be a nice overall scene but A)would look better with some clouds (out of your control) and B)the boats and trucks kind of turn it into a nice snapshot.
Colors are great though and really #4 is great, congrats.