Wonderful DOF of field on these, Ben.
First is nice. Not sure about the ideal crop but I dont think the 50/50 horizon split works to add anything.
For the others, I feel more contained in the meadow, enveloped by the wildflowers, esp in 3 and 4. It evokes many pleasant feelings and is added by the more pano crops and more on top, in the sky. 3 is my favorite. A beauty. Second feels like you are trying too include too much. Greens might be a bit too saturated but overall the colors feel realistic and the sky seems right.
BTW, I suspect your camera is level, knowing that precision is your goal and forte. But I wonder about a slightly less tilted meadow for aesthetics.
Scott