I play Gwent, if the profile pic isn't enough of a clue that I'm a huge Witcher 3 fan. I actually didn't even consider playing it in my first playthrough. I figure, the story of W3 is so interesting I wouldn't even consider playing a mini game while playing since I want to know what's gonna happen next! I finished the game, started a New Game +, then tried it. It was actually pretty fun and you get addicted to it, so much that whenever I entered a new area/town, the first thing I do is - instead of going to quest givers or following the main quest - is to challenge the people to Gwent. Yes, I think it's that good and fun of a minigame.