Tekken 3 P1. I also have a soft spot for the original, where it was just a guy with a mask in a suit of armour. His Tekken 2 P2 is probably the creepiest (or at least was when I was a kid), and I mean that affectionately. But yeah, overall, his T3 costume is my favourite.
John Lennon, 1940 - (Infinite Symbol) PSN: naathaann