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fighter avatars, fighter icons, fighter pixel art, fighter forum avatars, fighter AOL Buddy Icons
things I notice... right shoulder is disconnected, right pectorial is our of line with the shoulder angle as well as smaller in proportion than it should be, ab area seems caved in the way you did the shadows. the forearms start way too thick then shrink way too small in the wrists.
I know this is a year old now - but holy cow mate, I suggest you redo the top of this guy. I absolutely love the flow and intentions of this, and it'd be a shame to not update it with the things you've learned since then.