It's not bad, but it could be so much more.
Not trying to sound like an a-hole, but when I post my sigs I don't want to hear about how good it is, I want to be told the flaws and how to improve it. Criticism always helps people get better.
Flock, one thing I notice about your bgs is that they are all brushing. Start playing around with shapes and gradients to spice them up and to put more focus on the players. Also, try not to put the border on overlay. Inner borders can work well blended but I find that the main outside border always looks the best solid. Just some helpful tips, take them for what their worth.