It's because I'm a sucker for romance, and this drama (for the first time) have aplenty for YR...LOL.
Since Memory Lost and Flying Dagger were airing at the same time, I was too hooked on Memory Lost to pay attention to Dagger just yet, though I did peek on few episodes.
Even though I watched all episodes of Memory Lost, I still went back to re-watch some episodes, I couldn't detach myself
Again, it's more of the romance. YR and Bai Yu have great chemistry, this was agreed upon by the majority who watched the drama, and thus the CP award. Admittingly, I think YR exaggerated in her acting on some scenes, but nonetheless, she did a great job with the role :P