#3 has great water movement, composition which takes the eye round and round as well as scale with the little figures.
#1 is classic and I love the dynamic nature of the water. The three humans are good for scale but look like they are trying to ruin your photo by being disorganised... (not to mention unfriendly! Did you talk to them??
Is your screen calibrated? These look way to warmified for my liking on my calibrated screen. You have lost the beautiful colors of the sky and combined it into single yellow.
The trick to getting sharp(ish) images with flickr and this site took me a while. Now I export using 780 (long edge), sharpening for screen (moderate) using Lightroom and post the link to the image that is 640 pixels. I haven't found a formula for posting anything larger that retains it's sharpness. IMHO, the loss of critical sharpness makes pic look like shite even if they are strong to begin with.



