Damn, that's a pretty good looking sig right there. The only negative thought I have in mind is that I feel the smudging below the focal may have been just a tad overdone. This is your best work in a while. Keep up the pace.
It's a nice sig, good colors and flow, but it's just boring. It's just a guy surrounded by incoherent smudges.
Cut some off, picture in a second. Fixed, maybe? Isn't that what most sigs are, or at least just a picture with a few effects...Or in your case a scene, just a plain scene, with some text. That doesn't help much, as you can see. Could you elaborate on how the depth isn't good so I can fix it? I looked but didn't really spot anything... lighting, fixed, maybe?