Ear seem too big, globby, it's over AA'ed as well. Those lips would make Angelina jealous, and no I'm referring to yer snapshot, calm down. The eyes with pupils are too defined, Accident had it done better, but also made you look too much like Chino Moreno. Shoulders seem off-kilter. Forgive my absence of an edit. Honestly I don't feel compelled enough by this to create one, but I at least had some crittely crittely crit for ya. Like your out-on-a-limb palette. You should continue to play with it, it's not perfect.
. . . uh oh, with my Vista Windows cursor reverted back to the classic theme hovering over the "Post" button it suddenly hit me why this portrait is not working. You have a conflict of style's here, and peace negotions are resulting in even the opposing sides' diplomats getting into a fist fight after only moments of negotiations - You're doing the vexel style (like Panda) yet your excessively dithering. Vexel style is simply pixel art mimicing simplistic vector art, having very defined egdes, very crispy AA, no gradation, etc. What I'm saying is, I think that if you removed all dithering and only used "solid shapes" to define your volumes you may have yourself a humdinger here. End the conflict. Just do a quick dirty test, should take 1 minute to do, just to see if it "feels" right. Oh, and this portrait probably needs sunglasses and a poka-dotted bow ribbon in the hair, essential accessories you know.
My ear is tapered, i'm aware my ear is big and "globby". I've toned down the lips as you can see on the update below. Sorry to say also that Accident's eyes did not look like my eyes IRL, be aware that this is a self portrait and i know what i look like and that is not the only reference i use. (i could just go to the mirror lol)

Did i seriously make myself look like this wreck? I think not. I'm not middle aged, fat, have a goatee and have a egg shaped head.The angles on my shoulders seem so "off-kilter" because my shoulders are cut off from the portrait, probably gives the illusion of that.
And referring to using two separate styles that clash? I don't really care what kind of styles i use, i try to make it as good looking as i can. I seriously haven't heard of these styles you mentioned, this is basically my first shot at real pixelart, i'm kinda a novice. lol. Can't i be original or something and create my own style? Not sure what you meant by the accessories and whatnot but i guess its some kinda joke i don't get or don't find funny. :S