From the selections above, I'd have to go with Sasuke, but there are so many good characters from that series, I have about a half dozen I'd like to make some day (I've already made Rock Lee for myself, and my wife made a great Hinata costume ).
I've already done Sasuke for AX03, but I really want to go as Naruto. He's so out of character for me that I think I'd have a lot of fun "being" him. But since I don't have any income at the moment, I am just going to refine my Sasuke costume until I get it perfect. ^^
If anyone from Naruto, I'd cosplay as "The Great" Sasuke ("The Great" part coming from the Japanese pro wrestler by the same name ^_~). He just seems so ice-cool, although personality-wise I'm probably more like Naruto. ^_^;
Firearm of Mutiny, a.k.a. (Ken Hidaka)³