>>1433026i dont think it looks that bad. there are a few places i would add some black fill shapes too, like under the neck and by the right shoulder. other than that, i really would only make the lines a bit thicker. even .5 more px in width on the stroke would improve it imo.
the lines on the face (cheeks) should be colored, the nose/nose shadow should be a fill, and there is one tiny outline by the bottom left side of the sweater that isnt connected to the outline of the leg.
I have no idea why you're getting so much criticism, you did a pretty solid vector while you were bored. Make the lines thicker and round a few edges, some may not agree with the method but i think its fine. /opinions
ps, progress on my stroke vector.