Viking metal. I discovered this genre about a month ago, and have converted completely from metal to viking/pirate metal. Good viking metal bands include: Turisas and Ensiferum. A good pirate metal band is Alestorm.
If you like metal you'll probably appreciate this genre. I felt as though MPGH needed to hear this since not many people know about this genre. I'm going to see all three of these bands in March.