First picture,
As mentioned before it is blown out.
It seems to be because your lighting is from the right, but your picture was spot metered, which explains why the left side is slightly underexposed and falls within that flower's own shadow. The solution would have to be a lightbox or flash bounce form the top, giving equal lighting. A lightbox can easily be made for less than 20$.
Also, what caught my eye was the shadows in the background. Unless that is what you were going for (and I kind of like it) your subject must be far enough from the background as to not cast them in frame.
Equal, diffused lighting.
The same goes for the second picture, the light source coming form the top left gives off a shadow for the bottom right part of the flowers.
Last picture:
It has a lot of potential, like the flowers.
As mentioned, something seems to be up with either your monitor calibration or metering because they seem, off, dark.
If you where to retake it, (good practice, why not?

) Meter your camera for the sunset/ocean, then, flash on the cabin. (more on that in a moment)
Your light source seems to come from behind the cabin, bathing it in shadow. We need to up the detail on it. If you where to give it a nice wide flash at 45° to the camera, you may have something there.
Alternatively, for a low cost, you could probably already take it, more "arty" shot, Use a tripod, Small aperture (say, f/22) and several second exposure. While the camera is doing it's thing, "Paint" the cabin in light with a white LED flash light. As such, you'll have a clear, colourfull sky, Smooth, artful waves and a nicely exposed cabin! :-D