WOW!!!
The eyes in the foreground character are just beautiful, however I would just lighten the black outline a little (don't get rid of it totally because it wouldn't highlight the eyes).
Also, when I look back at some of your first pictures (page 4 I think), and compare them to what you have just drawn, the difference is just amazing.
Unfortunately (and fortunately), now that you have improved so much in some aspects of your drawing, some other not-so-good aspects show up, and for me it was the pencil lines which were a little too visible. I guess you should just try filling a 10cm square with one colour as uniformly as possible, and making the least lines visible. Once you can do a uniform colour in that square, try adding gradients, from dark to light, from bold to light, or even from one colour to another.