I like it. The only part I don't like that much is the font, but otherwise I like it. The colors are nice and I love the skull.
the way it's flashing I don't really like, the theme of the font doesn't seem to go well with the theme of the siggy
Some ways you can improve it are: Get rid of the flashing, resize it a bit smaller, and make an avatar to go with your siggie.
i dont know what everyone else is talking about but the flashing is great and i think the font does fit the theme 10/10 its great and i never got the whole make your avatar match your sig i dont like doing that so im not docking any points cuz of that XP