You don't choose the username, the username chooses you.
Niko Porikos grew up in an NTDP billet home. Cool story.
So, a couple years ago, monuMental made an entirely amazing wallpaper for the first UTL game. Being a large fan of monuMental's work and contribution to the blog, I modified his version for post-game purposes (the preview pics are gone but the Skydrive link should still work).
Please note: the above is only a preview version and you should download the widescreen version here. (Yes, I am lame and only did one version.)
Thanks again to monuMental and all credit really belongs to him for the original art and concept.