wow the picture is great it cool shading technique (well don't fully take my word for it i don't know a lot about art)
The shading in the background could use a little more blending, but it's a good drawing. I like the way it looks. Good job.
blending a shade make's a work always looks good, I hate it myself. but the work you do looks great, I love that mouth!
i wouldn't blend anything. the marks in the back show time spent on the work and it needs that chaotic unsmoothness to enhance the distortion. it's awesome.