The Witcher is a masterpiece, I also love Dragon Age and Mass Effect, these 2 are not really openworld but beautiful nonetheless and Bioware is amazing at storytelling.

The Mass Effect series, specifically Mass Effect 2. The atmosphere, the scale, the characters. It's the kind of thing where a AAA budget really bring to life things that AA or indie would have had to cut down.

Fallout 4. I have a lot of problems with the story, worldbuilding, and endless minor nitpicky complaints about this game. However it is an amazing accomplishment and when it does something right, it does it very right. The game is the foundation of mods that make it amazing, and while the game didn't create the mods, they wouldn't exist without the game. To me Fallout 4 is "I played this game for 800 hours and there's nothing to do!" kind of complaining.

Red Dead Redemption 2 actually uses it's AAA budget to fill out an open world with stuff

Witcher 3 was great, kept me so busy. The Uncharted series are some of my favorites, and the Horizon series are too. The set pieces in Uncharted blew me away, and I really liked the world they built in the Horizon games. The Metal Gear series has always been special to me, since it’s always been there as I’ve gotten older.

Mass Effect series for me. Great story where choices matter. And the characters are just so wonderful, ending the game felt like saying goodbye to friends.

The Last of Us, hands down. Both Part 1 and 2. Playing the remaster has been amazing. I played the PS3 version when it came out and was fascinated with the graphics. Ha!

After that, Fallout 3 and 4, and the Dragon Age games.

Pokemon Blue and Red happened during my childhood/early-teens, so I also loved the franchise for way too long.

Depends. If we are talking from forever. Crash bandicoot trilogy, mass effect trilogy, uncharted series, Witcher 3, borderlands 2, mirrors edge. There are too many games that have been amazing