The balance is a lil off IMO. One side is too bright, while one side is relatively dark. Other than that, it's a good sig. Nice and simple with effects that are definitely not overdone.
Text needs work. Effects look nice, and as other ppl stated above, I would make a smoother transition between the bright right side and the dark left.
Although I agree with some of the stuff said....its still a good tag...I personally like the text....