Needs a focal. Try sharpening the focal, and blurring the sides. You're close to getting flow, but try harder. The placement of the C4D is still off.
Smudging goes like \\ and the C4d goes //... The the spartan goes ||... Needs to flow better. Colors are reasonable but it's too dark.
I kind of like the style, but it's a bit too blurry. Make the lighting more apparent and the blur less apparent.
This is pretty good, but like Frag and Terrax said, work on flow. I also think that it could be cropped or made a bit smaller. The border is too small too, you should either make it bigger or get rid of it.
The stalk was blurred itself. bad stock but, i liked the colors. Stock. http://www.bungie.net/Online/Halo3UserContentDetails.aspx?h3fileid=80472626