Third one is the winner for me. I like the delicate shades in the first two, but...dunno, it needs something. The first one is a bit too flat somehow. The second gets better because the cloud over the sun gives some depth and texture. And then the third has not only great vibrant color but a great sense of depth and expanse. And I really like the rock in the line of the sun, breaking up that expanse a little and giving it some scale and more texture.
Silly o'clock Using the 24-hour clock, it's also called oh-dark-thirty