First, I really like this. I absolutely love tribal art, and abstract design. The only thing I see wrong here is the line edges but obviously that's not a big deal. When putting this on as a tattoo the lines will be straightened out more by the artist but I think for presentation you'd want to make it a bit more straight.
Second, I love the shading used in this. It made me click on it to critique. It's attractive, and jaw-dropping. Personally, if I were to get a tattoo I think it just might be this one. I can see you hand drew it, or at least that's what it appears hence my 4.5 on Technique/Originality. Impact, and vision were 5 which I think I already explained why.
It is absolutely stunning. Keep up the amazingness that is you!