I wont say it's bad, and it isn't bad, it coulb be better though.
first I would make a border around it , black prefrered.
second, you have around 5 or 6 colors in there, that's a lot!, the character contrasts a bit too much.
3rd the light in the middle could be more defined, make it look brighter
It;'s a good sig dont get me wrong, I'm just giving yhings to work on.
oh last but not least, you might want to outline your name to make it more readable
grtz Naz