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Swashbucklers are flashy.
Encourage your players to try outrageous acrobatics by awarding XP for particularly clever manoeuvres. Why simply charge up to an opponent and engage him in combat when you can vault over a gunwale and swing on some rigging, maybe even getting a bonus to your actions for dazzling the poor sucker. The player should have their characters climb, swing, jump, tumble and flip at every opportunity. Swordplay should be flashy too. Players will have to use their brains - try to anticipate their opponents' moves and surprise them with some of their own.