Divinity 2 is one of my all-time favourite games. The RPG game is enjoyable to some people, but not to others due to its nature: it's more of like reading a book. The skill tree and combat in general aren't very tactical: it doesn't really matter what you choose. The reason why the game is so awesome in my opinion is the voice acting and plot. It is one of the few games that have actually managed to give characters a value! All characters are unique, the way they talk, the thoughts they think (yes, you can mindread), the things you learn about them from other characters. It's not your standard RPG with combat, leveling and gearing points. It's a well written, interactive story you follow with your also unique character whose uniqueness comes from the choices you make and the impression you leave.
The game fits in the same category with Star Wars: KoTOR series.