#1 for profiles, #5 for poses.

I hate to be a conformist, but the pants on #1 really make him look better. Apart from the visceral disgust associated with guys in fruity little tights, wearing baggier pants makes me think he''s more classically dressed. I''d even like to see a shirt on him, and maybe some reduction the the mass of his shoulders and back, although I understand that those dimensions help with the style of his head. A lot of obvious muscles is for superheroes and dancers and strippers. Ninjas should dress for stealth and style.

Also, #1 benefits considerably from the shorter neck and the slightly lower angle of incination on the head. It makes him looker tougher.

#1 all the way, and I''d ike to see his knees bent a little deeper in #4 and #5, and his feet farther apart.

I''m also going to guess that #1 is the one you modified, judging by the change in pants, head, belt line, and ankle wraps.