I came up to Ever Night because of Meng Ziyi. I had to wait for many episodes until her first scene.
She played very well, as always. But in my opinion, she's also more suitable played as Empress of Tang, or the 3rd sister.

The characters I likes are:
I like Arthur Chen's acting, he is fit enough to play as Ning Que. Young, good looking, has a sharp look.
I love Song Yiren playing as Sang Sang. She is soo cute portraying Ning Que's servant. She is very lively, agile, cheerful, but also can be a shy person at some moments. I guess she is the most notable star in this series.
The one I also like most is Chen PiPi. He's very funny at silly enough at the same time. I enjoyed moments he is teasing each other with Ning Que.

For the story, I expect nothing, just follow the scenario. There is an unpleasant plot why Ning Que choose Sang Sang as woman to marry, not Mo Shan Shan. But somehow it is tolerable considering the reasons.

I have to give credit for soundtrack and music score. Jazzy song from The Old Chang' An is the best choice for this series to give another level of mood to enjoy. The other songs and music score is also very excellent to make the scenes more emotional.