You do have some good shots here. I will provide just some minor feedback since you asked. You are getting some cool colors on those first three, not to be unexpected with all that blue grey from the sky's and water. A bit of a warm up might get you closer to the correct color. You can do this in post processing or you can set your white balance on the camera to possibly the cloudy setting. A quick shot and check of your camera LCD will tell you if you like that look or not.

I also find especially with water shots it is more pleasing to the eye to make sure your water line (on the horizon) is straight and level. If not it tends to look like the water is draining out of the picture. Keep on shooting, you are well on your way!
