Consistency problem

Lately, i have the problem with consistency, and its really troublesome, especially since i need to flexible in style to adapt with client requests, geez...... it's really hard to maintaining drawing style, i'm sorry if my works are lacking in consistency, maybe i will overcome it in couple of years :D (well rome wasn't built in one day right :D). 

btw i managed to finish the lineart for my friend's art request, i have changed the composition of previous draft. here is the preview  :)