I really like the 4th one and the close ups. Not sure what the specific issue is but I don't think these are up to your usual level of "wow". The colors seem a bit... I don't know... faded? I know that may be what you're going for here but it seems a bit blah to me. Also this model's (client's?) facial expressions are kind of weird in a few of these.
Were these shot with film or digital? I can never tell with your images! 1, 6, and 7 are my favorites. I have a similar dilemma when shooting senior portraits in terms of getting shots representative of their age, not sexy glamour shots. Facial expressions are also tough, for me at least. There's something about that age that makes getting natural facial expressions out of teens quite tough. Though I thought you coaxed them out very well here!