These aren't bad. However I completely agree with daemon these sigs are all VERY chaotic.
However You nailed blending. You know what to do and how to do it when it comes to blending and thats somethign to be proud of.
To make things less chaotic try to use less fractals, brushes and Keep the pen tooling to a minimum (however you pen tooling is very nice!).

Coloring wise you are doing very well, You use correct color without making it Monotone. Keep that up. However I must say stick to using black or white borders. They work with sigs so much better.

Finally text. Try to keep your text to a minimum, you are already doing this so good job. However i think you should also try to keep the text in one spot. Text draws your eye away from the render, so when it's all over the place your eye just goes from one text to the other without looking at the sig as a whole. Put them together to make it minimal and create less of an impact.
Font wise The fonts you are suing for your name is great, they are default and they blend well. But the font's you are using for things like "strength" need work. try to stay away from script fonts. They don't look like default fonts (sans serif fonts, like arial) and tend not to blend with most sigs.

Finally with text stay away from Blending options. No outerglow no stroke no drop shadow. Overall though not bad you are showing significant amounts of gfx knowledge, keep at it!