Its not bad, but im not feeling it. I think the rear window at the bottom corner or top corner would have been better. You could then place other stickers up or down the side as you get others.
Like this
But if you like what you did, rock it. Who cares what i think or anyone else.
I struggle with the sticker question myself. In high school, I tastefully added a K&N sticker and Infiniti audio sticker. Do what makes you happy, but keep it tasteful! That one looks good.