the 2nd two are lovely, maybe shoot earlier or later in the day closer to the golden hour, you should get some interesting shadows. Also if it's almost dark and you use a longer shutterspeed you'll get nicer clouds with maybe a few starts.... just a thought
Love the composure of the third picture. I agree with Lee-Ann about trying to make use of the golden hour when possible, not only will it give you interesting and longer shadows but the colors will add some contrast as well.