also worth noting, the amount of colors you use.
the more layers of colors you add, and the more shapes, the more defined your vector becomes, and its that much easier to identify and can really bring it to the next level.
like for aerodactyl, you could hit the shadows on the stomach and whatnot to really bring out the contour of that mass.
(chou ~ wonderful custom status ^_^)
alphabetically, i'm comin after U like the letter V