All right. From what I've seen, I think the main thing that's limiting your artitstic capabilities is your lack of understanding of anatomy and how the body works.
Your portraits looks good because you copied them from photos (this is perfectly fine, there's absolutely nothing wrong with copying photos. A lot of artists do that). And since they are from photos, you were not required to structure a person from scratch. Therefore, not gaining any experience in making up stuff.
It also appears as if you didn't really use a rubber much, meaning the first lines you've placed on the page are your final lines. BAD D8<. It's better to have something that's messy, thought through and corrected rather than something that's neat and strange looking. It's important that you know what you're doing, if you don't, study up. You've got to know how big things are in relation to other things (e.g. the neck is half as long as the head). Otherwise, you won't get anywhere with your corrections.
Here's what I suggest you do to get out of that static pose, plan your poses. Don't just lay down you lines and that's it. Picture it in your head and try and transfer them onto the paper, drafting out the body with shapes.
Example -> [x]
(this is just how I structure people, there's bajillions of other ways)
You colouring style's a tad unorthodox. From what I can see, you're blocking them in with a colouring pencil (or soft pastel?) and smudging it like crazy xD. Most of the time you don't even fill up the space that you're intending to block in. It just looks a bit unnattractive (purely based on my taste). I suppose it's not harm in practicing using other tools (paint, oil pastel, watercolour etc...), it makes things a bit more funner if you know how to use a load of mediums in my opinion xD
Alrighty, another thing... I'd like you not to call that style 'anime style'. It's not that it doesn't look like 'anime', it's just that I don't think that's a good approach to learning art. Don't try and copy other people's styles, make your own. You can get inspiration from other people to put in your own drawings, but never ever ever aim to be like someone else, 'kay?