I like the floor texture. IF you don't mind C&C, I would recomend, going into your light attributes (assumung that you used a point light, spotlight or dirrectional light) and click on the Depth map shadows, it could make a dramatic difference. maybe turn the dmap bias up to a 6-8 to make them nice and smoooooth. Just a sugestion, I also like the composition.
THanks,
Brian