This is absolutely beautiful! I adore your value scale, your darks are rich and the reflection on the water is magnificent. There are very few things I could think to change... experiment a bit more perhaps? Like test out a very lightly shaded sky? I've been viewing your other works, and this is by far my favorite. You should explore the human form a bit more.
You should use this feeling of ambiance in the rest of your works. And the dark of your darks. Some of them seem a bit unfinished, but it's just my personal opinion.
Your technique is absolutely magnificent, thank you for sharing such brilliant work.