Also, I think that when she did a scene in which she had to cry and be upset over her breakup with Vincent, that she pulled that off quite well. It is a tedency of magor critics to somtimes over emphisize and exaggerate aspects of a film. But perhaps we can say that Sofia's charecter was just a quiet-like person.That she does not have to spill over with emotion and passion simply because she's Micheal Corleone's daughter, and we would expect her that way. And indeed, her deminer and attitude is sutible for a young girl of 19.