C&C per req:
1. Strictly speaking, since this has a lot of blown white, it's not actually high key, but it is close. The catchlights indicate a rather atypical lighting set-up for high; remember to light the subject separately from the background and to allow for good separation between the two. Typical 1 to 1.5 stops over is ample for the background, and remember to have your highlights on your rear LCD to check for blown areas.
2. I like this; I think this is really well lit, but a bit tightly framed. If you'd opened up around the subject just a bit, this would have been great.
3. To be honest... ho-hum. YOu need to raise your lights and your shooting position. "Up the nose" is almost never a flattering view! Unfortunately, you've also missed focus; the "mask" and left hand are tack-sharp, but the subject's face is soft, and again, she's rather tightly framed.
Overall, not bad; minor issues which are easily corrected.
Just my $00.02 worth - your mileage may vary.
~John