Niche metal is one of the new things to check out. Pirate Metal is no different. And I actually like it. There some sort of realistic relationship between pirates and metal. Though I think Pirate metal is just Power Metal with a recurring theme beyond trolls and wizardry. But I would even go as far to say that Pirates were the original metalheads. Ugly, hairy, violent drunks.
Anyway, check out some Swashbuckle.