One thing that might be changed at Yoda's signature: between the feet and the shadow there are some pixels that seem to be lighter than the shadow and the legs and therefore the figure itself looks like it is floating above the ground. So maybe you could try to darken them a bit.
Other than this I can't find ANY point of criticism! *y*
And after seeing those nice images the idea of getting my own pirate signature appeals more and more to me... :-$ So could I get one too?
For the case you'd do me the pleasure, my piratified Apo sigfig is attached! (Picture quality is bad though, I'll try to get better pics at daylight)