And perhaps the biggest problem is that they're cropped too close, and inappropriately. That's why her feet are cut off inappropriately, so I guess it's not the feet that's the problem, but the framing. This is true for both sets.
1st Set: The photos are too dark. The background is OK as it is, but there could be more light on her. Her facial expression in photo #2 is really awful, like she's not interested in posing for you.
2nd set: It's overexposed. Well, perhaps not technically in terms of blown highlights, but it's higher than it needs to be, even if this was deliberate. Her skin is very very white/fair, and you're shooting in front of a cloudy sky. It's a poor background choice for her. Her legs just blend into the background in the 3rd and 4th photo from this set.
However, I really do like the overall look. I guess if you had a model with slightly darker skin, and you turned down the exposure a tiiiiiiiny bit, they'd look really good.
I think she looks good in the 1st photo of the set, but again, work on your framing. She's in a really awkward place in that photo.