Well, over all, I would think you need to do a lot of reading about composition.
#1. What's the subject - the roof, the palm trees, the sunset - there is too much stuff in this image and it is does nothing for me and really comes down to just being a snapshot. This image shows as being a jpg. Why are you shooting jpgs? You lose a significant amount of your image information if you are not shooting raw as the camera throws away a lot of information and leaves you with a jpg. Also, if you need a different angle, get out of the hotel room and get down on the beach.
#2 Again, this seems to be all about composition. You are trying to shoot a sunset, or at least the last part of it and you have this large land mass intruding into the picture - why? - it adds nothing to the image. I would much rather have seen an image of the sky and the water with the colours from the sunset, than something with a big land mass in it.
#3. The horizon is still tilted to the left. It may not be as dark as it first appeared to be, but the "piling up" of components of the histogram on the right suggests that some of the image is blown out and thus not recoverable. As with the first one, the histogram indicates that this one is a jpg image. See my previous comments. Why ISO 1000 and 1/1000 of second? Landscapes (seascapes, sunrises/sets, etc.) should be shot at as low an ISO as possible as this limits the amount of noise in the final image. I could go on...
You might want to have a look at a book by Bryan Peterson -
https://www.amazon.com/Understandin...=1482132606&sr=8-1&keywords=peterson+exposure .
As I said before, you really need to do some reading and understanding about composition and the elements that go into making a good image as compared to a simple snapshot. Have a look here -
Photography Composition Articles Library , perhaps you will find something here to help you.
As far as shooting raw vs jpeg, there are a lot of web pages around that discuss this reasons for shooting raw, this is one of them -
From JPEG to RAW: A Beginners Guide to Start Shooting in RAW - The Easy Way - CHRISTINA GREVE .
WesternGuy