I agree that Goo Hye Sun's emotional (crying) scenes are among the best that there are. Going back to her 'Pure 19' days, when the impossibly lovely, and lovable 'Yang Gukwha' cried, you just wanted to reach through the screen and console her. In reality, Goo Hye Sun has always been a remarkably well-rounded actress. What you call an "A-list" actress from her debut. The reason that she continues to be sought after and cast as the lead in so many productions is that she's just so good. Her beautiful, "ulzzang" face is what got her noticed, but it is her talent, drive, and hard work, that producers, directors, and fellow actors love, and admire, the most.