The closer you go to the equator the more spectacular become the sunsets and sunrises, somebody told me. I am not sure 100% if this is true, I do not have scientific arguments, the only thing I know is that it lasts shorter.
Langkawi is a beautiful island, very touristic, but still many corners to explore. I will write a full feature article on it. The sea is not the best I have seen in my life however the Malaysian food is really one of the best in the world!!