Xukaifangirl88 forgot to mention Falling into Your Smile. A colleague of mine, who mostly watch K-dramas, fell in love with Xu Kai after watching FiYS a few years ago and asking me what modern drama of Xu Kai was as good. The chemistry was chemistrying. And it's a visual feast, as all gamer were handsome youngsters.
As for me, I started falling into Xu Kai after watching him as Fuca Fuheng in Story of Yanxi Palace. Sadly he's not ML, as ML was Nie Yuan. But his visual aced everyone else in the drama (every men were half bald with long braid in Qing dynasty, not everyone could look good half bald) and both the plot and the costume were great. But it's not for everyone. Many people disliked that era because of the men's bald heads.