Head looks to big in proportion to the body, or maybe it's because the shoulders are to narrow or the hips are far to wide for the overall,,, ehhh,,,, "form" of the body... The body symmetry just looks out of wack IMHO but I guess it's more realistic, can't have everyone lookin' like super models. Personally I'd put a bit more meat on the breasts to add some weight to the top half of the body. (that's what I'd do, but it's your model)
The face is nice from a realism standpoint, what I mean is that it's not perfectly contoured, it looks more original and realistic.
For a first try, I'd give it a 6.5
First of all, I didn't quite like the smile in the op. It's way better in the edit, as is her neutral expression.
As for the body, again I prefer the edit.
Considering you're going for a "girl next door" type, I think you've done a pretty good job.
If I were to change something, maybe I'd shorten a hair the distance between the eyes and I'd make the breasts just a touch meatier. Having said that, these are the kind of changes that remove realism, which is the goal if I understood correctly.
7.5/10, would easily bang.
I increased her breasts size a little, it seems more appropriate now?Not necessarily as big as your second model, but more proportional.
Before everything it's a question of ratio boobs/hips, and it works both way. A girl with too big boobs for her hips would looks as "weird". Naturally, boobs are subject to gravity, therefore they never looks as big as needed to reach the "weird ratio". But if she wear a corset (even a not too tight one) that would give enough support for her boobs to expand vertically, then she'll effectively look "weird".
It's a pure guess, I never effectively tried to compute a ratio, but for 3D renders, I would say that below a ratio of 1/3, it's "weird".