Well, this year, I'll probably at least use my Kunio costume for a short period of time again. But for the remainder, I'm going as the original creation of one of my favorite internet personalities.
http://www.spoonyexperiment.com/ (WARNING: Most content is NSFW. LOTS AND LOTS of cursing.)
Noah Antwiler, AKA the Spoony One, is quite possibly one of the most hilarious people I've ever seen on the internet. He's snarky as hell, he goes into loads of detail on why he hates things, and most importantly, he knows how to incorporate new elements into his reviews when needed.
Speaking of additions. In his Final Fantasy 8 review, he introduced the charater I will be going as in part 8, a mad scientist by the name of...
DR. INSANO!
He's tried to take over the world with an army of robitic Suicide Squirrels... he tried to kill us all with Push 'n' Eat Macaroni in a tube... and now he will try to take over Kumoricon!!! NYEHEHE! NYEHEHEHEHEHE~~~!!!
Edit: And yeah, I know he's not an anime or video game character... but I don't conform... to normalcy... yeah.