Great choice and god reasons too! I remember that evening well...It was red, sort of like Mars of something, not that I've been to Mars or anything. I like number seven too, no people and I like that it captures the texture of the sand in the foreground but a little further the sand looks like glass due to the water still running back off it. I prefer to see more clarity in the clouds but I think the interest comes from the contrast of the light in the water, the sunlight and shadow.
Thanks for playing along and letting me know your favourite and why.