Heya Miaou, welcome to ThePhotoForum
The forum is slow these days, and I have only just found the explanation for the fact in that "it is summer" right now, which, however, does not apply to each and every one of our members

... so you were able to take some "winter sunsets" only a couple of days ago.
Well, what I see in both your phtos here is that the horizon is crooked, and while this might work as a compositional element in some photos where crooked lines are used on purpose, I feel it does not go well with waterline horizons, and only slight tilts. They look downright wrong. A mistake.
Plus I see that the horizons are dividing your photos in two almost equal halves, which is considered to be "not good", for the feeling for distances and depth is not given. The photo is too balanced and thus boring. Not even the nicest sunset can work against it then.
Nothing that couldn't be "rectified" in pp-work (post processing) with the help of some cropping - and also some kind of pp-software (there usually is some on the CD that comes with the camera) can help you align the horizon.