Avvy: <3 South Park & The Matrix, so 8/10.
Siggy: I think it would look better if it had a consistent background, perhaps using the background on the left side. And the pawn and king on the left side just look like cut-outs, although I like "The Dream Of Every Pawn" part & nice fonts used throughout the siggy. I'd cut out the part on the right side, and move the fonts out to the edge.
I'd give it 6/10 with room for improvements.