I loved this game, and I kind of feel bad that the first 3 top reviews for this game are negative. It is not an amazing game, and to begin with the Gothic games were never regarded as really good games anyway, but it is surely a game worth checking out. I have great memories with Gothic 1 and 2, and while i did not enjoy Gothic 3, Arcania (even though someone else developed it) or the first Risen, Risen 2 is in my opinion a game worth playing and finishing and the best Piranha Bytes made so far.
So starting with the good bits, the story is quite good. It is memorable and so is the world and the quests. There are some exceptional characters with an amazing personality (Jaffar, Bones). It's supposed to be the kind of game where you want to explore every corner of the map, open every chest, kill every mob and do every quest to get the highest amount of exp and gold to become overpowered. And this is why it is the best 'Gothic' game, because it does a very good job at that.
And the bad bit: the combat is simplistic, and the boss fights not that epic. The factions are not as good as the first games. The talent tree is not perfectly optimised but there are unique 'piratey' items in the game that sort of help that later in the game. Some abilities are pointless and require a lot investment to get them and muskets are just too strong. And while you are a pirate captain and hunt down other pirates and have your own crew, plus the drinking and shooting mini-games and treasure to find, it just doesn't feel like you are a pirate. Oh yeah and main flaw, achievements stop counting if you exit the game.
So if you want a relaxing 'piratey' game, with lots of conversations, zones to explore and loot to find I think it does a pretty good job at that.