No, NJMAN, there does not seem to be any pattern to things. I try to "post strategically", no success. I post as I have time (when most of "America sleeps"), no success. I post upon request of one member, little pics only, not even my usual size, BIG SUCCESS all of a sudden, so much so that I no longer understand what is going on. It is really hard to tell what it is that makes people just look OR look and reply. I haven't understood it so far, either.
Of these four, also I like the first best of all, for that cloud really DOES look thick and white and well-textured. Though personally I am not so sure I like the inclusion of the bridge here. I think I would have liked to see just the river, the green river banks, and this marvellous sky!
The effect captured in 2 is a neat one. We had the same sort of clouds only the other day when I was on the road, taking Sabine, my daughter, to the swimming pool for her training, and she kept staring out of the window saying: "Awww, this looks sooooooooooo nice!!!" As it does - only do I miss a bit of "anchor" in your photo here, to my mind there is too thin a line of ground included within your frame, only just a LITTLE too thin, but too thin all the same (is my opinion only, of course!).
Saturation in the third is very strong, I feel, and although it shows that swimming in the river on that day was fun, the photo as such does not speak to me that much. Hard to put into words, why not ...? The scene is too far away, I guess. There is too much to be seen, you capture action (not nearby enough) plus the wideness of the sky and the river and the countryside ... so maybe there are two things competing?
Photographing into the other direction, i.e. against the light, is risky, but you pulled that one off nicely, I think, with the many little highlighted bits on the water plus the intense green of the grass that only shows THIS green when seen against the light, and the outlines of the trees in the background which almost looks "painted". Did you do anything about them in pp work?