Pic #1 - worth to improve on
Exposure
The sun is a very difficult subject to shoot directly. Choosing the right timing to shoot it is crucial. Always bracket your shots when shooting sunsets. Judging from the white patch of both the sun and its reflection on the water, one step down should be better.
Composure
Composure is a very subjective matter but for this scene I would shot it in landscape for a better impact. Not all the case but usually, scenery with wide angle lense looks better in landscape. Also, I further reinforce what KCLow had said about the background tree and roof. Taking this picture from knee height level would certainly make a better impact.