Simply amazing, to say the least. Looks like you and I share another common intrest. n_n
Hawaii picture- Great contrast between the sea and the sky, the mountain/island pulling everything together. It gives you a point of intrest, directing your eyes to the sun, and there's not too much of a glare, which is hard to capture. The only advice I have is to next time bring the camera up a little. It's a bit heavy on the sea, dragging you away from the sun, and would give you more of a view of the sky and all the colours in it. Plus the mountain-island, as I have decided to call it, wouldn't be dead center. It doesn't normally work when something is right in the middle of the veiw. But it's still great, Nat!!
Hometown- Another interesting picture, with nice perspective. The angle is great, showing you a hint of the land like the road in the background and the trees in the foreground, both silhouetted by the sky. The clouds are beautiful, really standing out, and the whisp of pink and orange in the sky waaaay back there adds warmth to the cool shades of blues and greys.
You did a wonderful job on these, Nat! I really am looking forward to more!! n_n