personally i think this is a bad picture, other than the beautiful color
the people blend with the waves in shadow, rendering masses of blotchy shadows that do not resemble anything human, which kind of defeats the purpose. perhaps a moment where people were clear of the waves and against the bright part of the waves would be better.. patience is key in getting a great shot. if you can't get it, then do it another way. another approach would be to bring out the details of the people, though i expect this would be hard to achieve without hdr
besides that, there is a certain softness about the picture as mentioned by yehosaphat. the umbrellas at the bottom right, along with your extremely obiang watermark (make it smaller please) really irritate me
hope you take this well as an honest comment, if you don't see it as such, then i guess do not take it at all, cheers