In my opinion you need to refine a bit your inking. Right now all lines have the same weight, while the line thickness should vary armonically according to what you're drawing.
This is an example of what I mean.
You seem to ink in Photoshop, so
this tutorial could help you. It's for Painter but also useful for Photosop. Just look for "Inking tutorial" in Google or DeviantArt to find tens of tutorials like these.
Do you use a mouse or a tablet?