This is a very good picture. The tilt add texture and character to the picture and so des the bass or guitar I cant tell wether its guiter or bassist. I loe the focus of the lense it is very well captured although you might want to increase ether the brightness or contrast just a little.
You yourself, as the subject don't seem to be noticeably tilted, and between that and the shallow DoF I get the feeling that the world is tilting around you, and I'm just watching. I like it. I like the atmosphere.