Cool look - I particularly like the overall "softness" of the design. My only two worries would be printing (sometimes things look way better on computer screen then they do on paper), and the second would be that you have a fair bit of flat black, which will show the occasional spec of dust (this is the reason most decks have very intricate backs - so the random dust particle isn't as obvious).
But even with both those concerns, I really like this approach as it straddles "classic" and "different" really well. Good job!
Luke