i like the colour of the sky on the first shot, maybe a portrait shot would have generated more drama with that, try cropping it to portrait..
not keen on 2, its just lots of sea, maybe a better angle would have worked better, not sure really...
3 is ok, though the camera has focsed on the rock in the foreground, that loses a bit of drama to me, again, better composition would have made a big difference to an otherwise good shot, the foreground distracts alot for me
not seeing 4 for some reason, big space, but no image...
does your camera have the option to lay a grid on the screen?