Help me Improve my Art Please

[ElemenTalia]

Lately I have started to draw seriously. I was wondering if I could post several examples, and if people could check through those examples, and give me advice on how I could improve my drawing. At some point in the far future I do want to be able to draw realistically, however I want to also be able to keep drawing my own style. That style I want to be semi anime, and semi realistic. I think if you check my examples, it will be less confusing, and a bit more obvious. If you could give me tips to help me achieve this affect, I would be highly grateful.

http://i205.photobucket.com/albums/bb92/ElemenTalia/Commissions/iSpencer_kun.jpg

http://i205.photobucket.com/albums/bb92/ElemenTalia/Commissions/Ryona.jpg

http://i205.photobucket.com/albums/bb92/ElemenTalia/Commissions/Kenshin.jpg

http://i205.photobucket.com/albums/bb92/ElemenTalia/Commissions/IchimaryGin.jpg

http://i205.photobucket.com/albums/bb92/ElemenTalia/Commissions/Friends.jpg

http://i205.photobucket.com/albums/bb92/ElemenTalia/Commissions/MsGrimm.jpg