Halo Signature

Uhhh...
Not my best i think...
http://i39.tinypic.com/14mxmh4.jpg

good work

http://i41.tinypic.com/27yqww6.jpg

I don't like the fact that the left side is blue and the right side is brown.

Also the right side is too empty IMO.
The effects near his head on the left side are looking a bit lq/oversharpend.

You also need to fix the lighting a bit. Dodge the left side of his face a bit more ;)

Text needs work.

Keep working at it ;)

Its too empty
Fix the lighting
Looks to sharp in some areas
Use a halo font lol:)