Well, the whole thing is over blurred, I don't like the left side, but the right side is ok. Mostly the blurriness...Its HQ blurring, but just looks odd IMO
^^^ overly critical I don't really think it needed a border either. It's actually really nice, the smudging is really cool and it seems fairly HQ. Lighting is good too. You need to make sigs like this more often instead of that paste anime render stuff.
The smudging on the left messes up the flow of the sig, in my opinion. Try smudging towards the direction of the flow..
I think that this is a fantastic sig. The screenshot that you used is really cool, and I think that the smudging is perfect. It gives an interesting effect... I can't exactly figure out what it is... I also think that it is great without text. Text would mess up the sig, IMO, because it has this cool style at the moment and text seems like it would look odd. Overall, fantastic job!