I feel as if the render is a little... rough, if that's the right word.
But I like the... cartoony-ish-ness-izzle of the background. On the right, at least.
This one feels a little... boring. Compared to the purple tag you did of this same guy. And compared to the Afro Samurai tag.
But, from what I've seen, this is your best background, I'd say. Other than a few random... glitches, I guess you could say.