If I might share my opinions on your work...
First off, I hardly think your composition 'sucks' ... and depending on how much time you've been immersed in portrait photography, your composition is actually very decent but what it might lack is a little edge to bring out your model further...If there's somewhere I can offer a suggestion on improvement... it'll probably be to be more aware of portrait lead-lines...
I'll break down it shot by shot to help understanding..
#1. For expressive face shots, I'd personally frame my subjects closer to maximise whatever feelings portrayed. In this case, both the green 'leaf?' can be recolored a soft matching background hue... and also highlights on the chains reduced prevent it from distracting the face.... but probably most 'subtly' drawing viewers away is the two 'highlighted' poles stretching to the top left. Any line on a 4 cornered image going straight for the corners always draws attention away.. so that might be helpful in future compositing.
#2. This is actually a good shot, perhaps slightly blemished by a rather bottom heavy composition. The inclusion of the model's hand adds to the bottom weight.. easily fixed shooting just below clavicle and omitting the hands so her profile takes the limelight.
#3. The inclusion of a hand here... is actually fairly commonly seen in portraits... what might be enhanced might be to give more hollowed space (gaps) between hands and chin.... which a) create more 'depth', b) gives her chin better definition without the hand pulling away a prominent visual anchor... and c) prevent the photo looking slightly bottom heavy... Basically good to have some breathing space in between different parts of the body.. my guideline is always to wrap the face without touching... (fashion photographers here on CS will can show hows it's done better since they are experts at face framing with hands)
#4. Aside from the highlight distraction.... I find your subject to be best photographed with her hair framing her face... her pixie face (sharp chin, clean jaw, soft features) I think will benefit from being framed by her darker hair... all which helps to accentuate her face even more... You have done this marvellously from #5 onwards...
#5. I like this shot... Might be a case of some saying the hands is 'poorly cropped' but perhaps by choice or chance, saved by her short skirt (thighs rather)... which takes away all the attention from the slightly miscomposed hand.
#6. Again, Not sure if the full flat of the hand seen is on purpose to showcase your signature. Usually, this would be a distraction, but if used to bring attention to your signature, it's actually used well. I'd give a lot of commendation that her legs are positioned to give modesty... which otherwise might make the image look more racy than intended.
#8. I'm very bad at contextual compositions... and won't give my opinions too much... but placing the model on a "loosely" grafitied background in contrast to the right side's 'fuller' background.... is in my view, compositionally creative.
#9. Like this shot a lot
#10. I love this shot too ... a lot of eventual focus to her eyes... which in this case, I might personally liquify to balance her left eye to her right
I guess most importantly... it's great you felt your comp sucks.... as do all learning photographers like me feel.... Never stop to think even the most stable compositions can't be improved... but I guess sometimes when you think u 'nail' a common usable composition, we all tend to take photography for granted and stop trying to try something different.
Hope my comments were helpful in any way...
Cheers!
Ejun