I like what elopez said about the organic feeling of the sketch, how it looks kind of like it's a drawing on rough paper. I like the pixelated lines because it feels to me like the "drawing on rough paper" and "computerized pixels" aspects create a strange and wonderful mix of traditional and modern.

What looks interesting about this brush is the "toothy" texture that the brush is giving. It's almost as if your drawing on paper that is more rough, and that results in a more organic feeling to your drawing. But I do think that the pixilation of the brush also makes the drawing feel a little off balance, so I think it would look better if you stick with a more a clean line. The pixilation just stands out a bit too much to me, but it still looks good from a distance, so it may not be much of a deal breaker either way.