Some messy work in need of critique

[Mega_Virus]

Your character's terribly off-balance and suffers from banding. The legs on both characters need some revision too.

so... wazziz "banding"?
and the off balance part was that he's supposed to be kinda in a sort of free fall/ plain 'ol in the air.

I know, whats up with these unusual words I don't know what that sentence means either except the off balance part, can't you guys make it simple so everybody can understand, and learn easier.
I personally think its not off balance, to me it looks like he's taking a gun fire, also looks like he's a gansta if you had him tilted forward than it would look like james bond.
I don't understand why you named your topic messy work when its obviously great work, just the only thing I think you need to do to it is smoothen out the outlines of the sprite in some area's I'm sure you know how to do that if you can bust out a sprite like that.
If you want it to look better than here are some things that will.
- Angle out the gun with the hands angle.
- Give more shading in certain area's, and the light power is different on the mask then the rest of the body same goes for the right leg.
- The knife, and him holding it is wierd.