This is AMAZING! I could never do so many folds but I'm glad you did because it just makes the picture as a whole! I actually thought this was a high res photo from the small pic through DA browse. Simply, a visual feast.
Still lifes are an invention of baroque (period of artistic style in the 17th century in Europe). People in that period of time had three main motifs in art which also represent their attitude towards life: * "Memento mori" - 'remember that you will die', * "vanitas" - 'transience' and * "Carpe diem" - 'seize the day' (i.e. "Go have fun today... you might already be dead tomorrow!")
Skulls were stylistic devices which depicted the idea of "Memento mori": Skulls should remind the audience of their inevitable death.
The origin of this rather depressive/melancholic attitude towards life were the horrors of the Thirty Years' War (1618-1648) among them pestilence, hunger, marauding mercenaries and Reformation. One whole generation grew up during wartime - their lives were forever marked by this experience.
Yeah, the shading on folds and crumples is always the worst. Is it odd that my favorite things about this painting is the flower painting on the teapot, though? I feel like that's a little odd. Either way, nice work.