I'm generally okay with Assassin's Creed games, but, Black Flag was really meh for me. Like, the only thing I liked about it over the last iteration of that series was making viewpoints matter.
That's probably the only "pirate game" I've played, to be honest.
*Edit: It probably didn't help Black Flag that I absolutely hated navigating the boat in AC3, and AC4 was almost literally nothing but sea navigation!