Text is good but not it's placement, over his right shoulder, on the snake would be a good place. The whole sig has kind of a lack-luster mood, the moon should be somewhat brighter so you can instantly see it's a moon. Whole left side should be brightened up. Continue the left side onto the right side, you had a good thing going there, right side looks more or less like a mess how it is now. His right arm looks very awkward the way it is.
Your vastly improved since you started, but I'm just going hard on you now, cause I know you can do better. Look at some signatures on deviantART or other sites, look at what works and what doesn't in a a signature. Take bits and pieces from each sig, and use them to create your own ideas for what you want. Tutorials always help too.
Keep 'em coming wenduo.