in "Cute girl" the arm on the hip is really off, i can see you're trying to add perspective by foreshortening, but it didn't work that well
"Grabrielle" has the same problem with the arm, actually, it looks worse.. and the face, my god~ it's creepy...
the pose and composition for "Furude Rika" looks way too familiar, so not sure if you copied it or something, but if not, no problems with that one, it looks great!
"Becky's" face is also weird, and her right arm looks abnormally long... also, not sure what it is, but the ass/thighs looks weird, almost as if she's leaning too much on the right cheek..
anyway, your painting/coloring is really good, you just need to work on the faces and proportions a lot more
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