pirates and you can have ninjas, but you cannot have both without an epic beatdown.
Everyone seems to take a side on which is cooler: the roguish pirate or the mysterious ninja. Practically all fantasy MMOs have both represented in some way, whether it be World of Warcraft's Bloodsail Buccaneers or Guild Wars Factions' Assassin. If developers really wanted to inject some life into PvP, they'd make it PvN -- Pirate vs. Ninja. In any case, these two pajama-clad murderers are inseparable from our games, and chances are you've come to a conclusion as to which adds more flavor, panache, and coolness to the setting.
I'd like to say that we're going to settle this debate today, but whom am I kidding? It's never going to be settled because people are still bickering about Mike vs. Joel, Picard vs. Kirk, and Big Red vs. Doublemint. Let's just say our piece and then commence with a duel at dawn in the comments, m'kay?