For your most recent sig (
http://i.imgur.com/rTKRM.png) I actually think you missed the mark a little bit. I love what you do with text, but in this case there's far too much text. You've had images in the pact with backgrounds full of text that didn't look crowded like this one does.
Potentially if you had more light effects it would look a little less text-heavy, but I would actually just remove a few strategic lines.
Hope that was helpful. Also, you owe me a rematch, and this time around, you get to pick the theme.