They liked money. Not many used broadswords! In battle it was to long and if you want the ship, you could by accident cut down the rigging! So a lot used cutlasses.
They not only attacked ships, but towns. Look up Henry Morgan. He attacked many towns with huge amounts of massacre. Go us, right?

(Sarcasm)
THEIR AWESOME!
A lot liked small fast ships. For sailing near land, getting away from warships, chasing slower ships,

, not being able to be hit buy those forts with high cannons, and not being able to be hit with higher - decked ships ( They seem to have higher cannons and they can't hit lower decks )
A lot spent their money on rum, ale, wine, and weapons.
Their really isn't any evidence that pirates made people walk the plank, or buried treasure.
Many didn't know how to read, but Blackbeard did.