Ok first off, I like the fact that you flipped it, for some reason that perspective seems better. The one thing that's bothering me is the different...I'd hate to call it textures but I have no better word for it...the difference in the background and the helicopter. Where the entire background city scape looks somewhat faded a if it was foggy or rainy or something to not allow sharp lines...and then you have the helicopter in there that isn't a little faded out like everything else. I mean don't get me wrong the design and layout are amazing, just the unfazed helicopter makes too much of a stark appearance that it seems a little unnatural.
Could just be me, I still think it's a great piece, I love the cityscape.
i wanted the helicopter in the focus so the bg is hazed and a little blurred. I think its clearly an improvement over the sketch before, but everyone has his tastes and I respect it Personally I like how much the vehicle is coming forward and instantly noticable... thx for thoughts!