[quote=@ErsatzEmperor]By this logic, could I play a mega-nerd, obsessed with Star Wars that teaches himself the Lightsaber Form "Djem So" or would that be a stretch?[/quote]

It would be quite unorthodox of him/her to learn a fictional fighting style, but part of the Shinobi training is gaining knowledge on pop culture, so no - it wouldn't be much of a stretch. Although, I can see him/her being ridiculed by his/her teammates.