that first one is really nice. :) however, the other ones appear to have too much contrast, apart from the second which i thought was pretty good, got a nice piratey feel to it :D. the rest however arent great, on the 3rd one, selective colour doesnt really work often. On the 4th one the contrast has went sky high, and has left the sky looking really sharp looking, which in my opinion is not good. Try not to over filter your work, but the first one, spot on, great! :)