I would just love a pirate themed game where instead of starting out as pirates, you begin by being a fresh new captain who is tasked with hiring shipmates, buying supplies and then a boat.
The main thing would be that you control how your fleet ends up. Things you do reflect upon your shipmates and you have to manage supplies and repairs.
Also there would be things where you could manage the politics of being a captain and stuff like that.
And your actions would shape your fleet, like say doing a bunch of bad things (stealing and murdering) would in turn make your crew a pirate crew and stuff like that.