Holy smokes, the brightness on the render is out of control. Outside of that, it is a tad plain, but overall this isn't the worst. One of your better signatures though,
The only real issue with the whole signature would be the lighting, it could be much better. This is very simple, but it is also very effective. Great job with this, for a simple clean signature.
Coloring seems a tad off, and the blurring here is kind of bad. Outside of that, this is a great piece of work, and it is one of my favorites from you.
You're so much better than this. Lighting is way off, font is terrible, and there is no blending whatsoever. I think you just need to scrap this whole thing, and move on.
The only real issue I have here is the font. I love the JC and the stock work is different from the normal, but I like it. Keep up the awesome work fam.
Like damien said, the lighting on this signature is pretty off. Also the text needs to be put on SMOOTH, and not whatever the AA is on. Not terrible, but some small noobish mistakes.
Coloring all together seems a bit off. Left side is far too bright. Also it seems a bit low quality, always try and get everything to the highest quality possible. Sharpening could be what made it lower quality.
Easy and effective for what it is. I am not a huge fan of the placement of the lighting on the text, but it isn't too bad. Love this though for a avatar, looks great.