Yeah man I remember you. Welcome back, I'm actually not really active on the site anymore either. Just pop in occasionally to post artwork.
As for your sig, it could definitely use some work, but it can't be helped because you've been on a pretty long hiatus. It needs more effects in general. Everything but the lower middle of it feels empty. You should probably scrap the text and get rid of that weird effect over the left wing. The color scheme works, so just build on it a little bit and it will look just fine.