I actually like it. It's something different. But I would have really liked to see text in it. Especially since it is based on a band, others may not know who it is in your tag. Which is why it is a good idea to place texts of the name of things like this so that when random people view it, they may like the tag and will be able to check out that band based in this tag. Because not everyone knows who Muse is sadly. Just a small suggestion, good work though.
As Koolest said, a bit pale, it could need some "colors" or gradients. A nice text could be interesting on that tag.
I think it's a pretty lovely sig. Though I would suggest getting rid of some of the effects that are on top of the guitar.