I'll be blunt in saying they don't suck, but they're not awsome. They're about the same as what i usually see. the faces - specifically the postioning of features (eyes, cheekbones etc.) - and hands/arms need some work, but there's nothing new there. on a few the postioning of the hands looks akward. the anatomy is overall accurate except the perspective is off on thefirst one. could be improved upon though. One more thing i would work on is the way ur lines work. In my opinon they should be a bit crisper. too many people don't have the angles when they need them, and everything ends up curved. >.< Also the little details add to the real-looking-ness of the picture in some of them, the hair doesn't look right..... I think it's important to get the basic concept that hair is in strands, and so keeping that concept in mind, it looks more realistic to make the hair tamper more at the ends, and maybe even break into smaller strands on the way down instead of one big thing. Same thing when you tried to make the hair blowing in fifth one. just sticking stands out of a clump that is straight doesn't look realistic enough.
srry if that seemed harsh, i'm sort of a heavy critic at times. I mean well, though. The only reason i said all of that is because i think that many people have the potential to draw great, they just don't realize it, and in pushing urself to draw better, that talent can awaken. feel free to criticize my works if u want to. Oh, and all those r what i think. if u don't like what i think, then ignore me, and forget i said anyting.