I'm always impressed when people can draw animals; that is one of my downfalls. However, there are a couple of little bugs that annoy me.
First of all; I want a background. I know you drew this real quick for an rp, which is fine, but you could have easily gone back and drawn in a few trees and a rock or two to make the scene more believable.
Another thing is the pixillation. I don't know what program you did this on. However, I know in photoshop, you can easily make the preset so that you won't have pixillation in your final image before you even put the pencil to canvas.
The final thing that bothers me is how blotchy the wolf is. It would have taken you a minute to go through with the eraser tool and get rid of the marks outside of the lines. And vice versa; there are parts inside the wolf that have no shading at all.
However, I do love your style and I see a lot of potential in you. I don't write critiques by looking through an artist's gallery, so I don't know if you do more finished work than this, but this is a potentially strong piece that needs a little bit more love to be fully tight.