Really getting sucked into this game now, I've put about 21 hours into it. Definitely a lot to do.
I do have some gripes though.
-The environments are beautiful, but very few are interactive, at least to the extent I'd like to see in a game of this scope. Like, the cities... especially Novigrad, it's so huge but you can hardly go into any of the buildings or interact with any of the items, and there is basically no reason for me to walk around and explore it because it's an empty environment. A beautiful one, sure, but there's relatively little placed within it to engage me. It reminds me of some of the gold GTA games in that regard, but at least you could get on top of a lot of the buildings with helicopters or run around killing pedestrians and shit

-The score, while beautiful, gets old pretty quickly, especially the fight music.
On the other hand, I do like the strategic nature of fighting the monsters, as well as just how much there is to do in terms of side quests and contracts. But I don't feel quite the same urge to explore this world as I do with other open-world games like Skyrim or Fallout or Red Dead Redemption. It lacks some life, IMO.