Ok Zukatta, lemme see.
You've got the style real nicely, no matter if you post a sketch, it ends up looking nice. So you are fine with that.
Now, I look at the shading and think it's correctly placed. Nice going.
However I don't like how simply the colors sometimes are. Try experimenting with all sorts of colors for; exmple use highlights and shadows.
the example

It's not that Antara (who looks verrrry fat on this pic DX) has pink furs. She has pinkish shades. Which I believe makes the picture more colorful and eventually blends with the not-mine-but- respectfully copyrighted background. Don't just try experimenting with shades, but also try with highlights.
Also a tip, in "layer properties" on photoshop theres an option called "inner glow" and "outer glow". It's what I use to give light to my pictures. Try messing with it, it's fun.