If they attack SH performance - I am all for constructive criticism. However, if it is blind attack for example, she always acts the same roles then I disagree because Gominam, Cha eun sang and the most recent Choi Inha are very different roles (just to name a few). I agree with SH herself that it would be fantastic to see her in a role with heels and a nice suit, maybe a lawyer/solicitor would be great.
If they comment on SH physical appearance - her looks are gifted to her by her parents. Like she once said herself. I am glad she got over it and never went with plastic surgery like many actresses cause I personally believe it affects their facial acting ability. What I did agree with some comments was SH used to be chubby but recently she has lost a lot of weight and the choice of clothes she wore to some events were too dark in colour. SH is young so she should wear plenty of bright colours. It compliments her skin.
If they comment on SH being overrated - popularity isn't something which can be earned overnight. I have been a following SH dramas for many years (ever since Stairway to heaven). I don't just watch her dramas but SH has this ability to draw viewers into her character so well. Even the most bland character that Kim Eun Suk gave her she was able to act it out so well with her eyes. Chemistry is subjective and for SH to replicate the chemistry she has for each male co-star is some feat.