Personally I like the way he looks in your sig the best. If I'm correct is that his 'Mr Karate' version from Battle Colosseum? He looks like 'Evil Ryo' in the KOF XII design. I like when he has gloves on better too.
Yeah that's Mr. Karate Ryo, who is personally my second favorite. I like the Ryo from King of Fighters XI the best, mainly cause he's got a guard breaking move that is pretty handy.