My hobby

So awhile ago I posted a random drawing I did onto this musician's myspace page.
He's a rapper, and I like a lot of his music. Anyways, I had a couple other musicians who saw the drawing send me messages asking for me to help them with some art work. One of them actually followed through about a week ago. The name of his album is The Subjective Nature of Sound, so this is what I came up with:
It's not all the way done, I told him I'd do a logo for him too. He really likes it though, and said he'd advertise for me, so we'll see. It'll look nice in a portfolio, if I ever decide to go into advertising or whatever.

Stephen