I personally like default fonts or clean, sophisticated type of fonts rather than anything too artistic or decorative. That's just my style though.
As for the banner itself, I think the top green/cyan stripe is a little too striking compared to the rest of the banner unless you're going to add some other stripes with the same color. The blue also seems out there.
Personally, if I were to keep the top "stripe", I would change the blue one to the same color and perhaps fix the hue and make it less intense. :D I would also avoid fading out the guitar; the orb seems to make the banner more solid, so the guitar should match with it. Again, these are just my preferences and it's up to you to change it or not. :]
Otherwise, it doesn't look bad.