photo of the girl is the best of the lot, not because it's got a girl but because it's well composed, you've got a specific subject in the right place.
the problem with the photo is, it's all flash, what you really want is some ambient light in there, I'm guess it's the sea behind her? a slightly slower shutter speed would have exposed this and then the flash (on slow sync) would have exposed the girl.
the sea / cliff shots are very noisy lacking contrast and nothing really of interest, the one of the two boats, what's the subject (the boats obviously) but you've got some plant in the foreground competing for attention, that you could improve with a crop.
Just keep shooting and reading up on photography
