Soda I think the audience has spoken this time. Its your art and all that stuff but sometimes listening to the audience is important too especially when the opinion is the same by all.

I do think this is good work from you. Your progress continues at a steady pace :)

I like simplistic elegance, but this piece still feels too unfinished...

Uh, how 'bout adding some legs and the body. Green eye does not fit something that appears like a sketch. Post a reference and finish it.

I think u should improve this. But thats me.

It looks so good! But it could just be a tiny bit better if your lines were smoother. Some tips? Fill up the gaps, and make the AA color a bit darker! I like it a lot already now, but it will become much better than for sure!

The green eye really finishes this!

still feels so... unfinished and rushed...  

Updated with AA. 

Yeah, I'd really like to see this shaded. Like that one peice by Big Brother. Its cool but... lacking.

Dude, you know you can improve this right?
Simple is one thing but...
You have improved too much to get away with this now.

*refine the lines, add skill techniques, create a mood/feel...go.