This coming from someone who played TW1 and TW2.
The Witcher 3 ( Death March ) 90 hours, base game completed
Gameplay:
Exploration: Simply the world is too big and cluttered, theres no sense of surprise or exploration. Just following ? on a mini map, or disabling it and being unable to easily distinguish NPC number 39839 to from NPC 0984 who has a quest. Not being able to climb unlike BOTW is a huge hindrance and makes exploring the world a chore. The horse riding is not enjoyable or smooth.
Combat: Its so-so. Nice variation and options but ultimately the enemies are too dumb, and just being able to quen + sword + quen + whirl + igni is boring. The adrenaline system is interesting but they should have concentrated on perfecting the swordsplay of Witcher 3 first, making all weapons such as bombs and cross bows more relavant, making bosses stronger.. and they simply didn't. Games such as Dark Souls have maybe set the bar too high. Also giving us Bestiary entries AFTER defeating animals is all a bit redundant. I would rather the enemies be more difficult and complex but with more detailed hints in the Bestiary about weaknesses etc.
Ciri segments: I found these boring. They should have let us control Yennefer or Triss and explored some magic-related places instead of some of these Ciri segments.
Alchemy: Very poor, not encouraging exploration, too easy. I prefer having to repeatedly craft things, it makes you care for ingredients and items more.
Scripting: Scripted events make exploring not worth it. You need to find the write sequence of events to start a quest or fight a monster which sucks compared to just finding it out in the wild by loving the Witcher 3's world.
Story:
Pacing: is so-so. For a 90 hour game, I would have expected more. I wanted to see more of the sorcerers, more of the Societal who just weren't there, more of Radovid rather than snippets. Instead we lived Geralt's journey, and I get it; thats what the game is but I wish they took his journey to a few more interesting places.
Also I felt the third act was just plain underwhelming after you beat the first boss guy. The Battle at Kaer Morhan or whatever its called had an AWESOME build up, only let down by the combat being crap.
Sidequests: best-in-class
Plot: Excellent
Characters: Excellent cast but I can't help but feel disconnected from Dandelion et al. The Dwarf guy was quite endearing but we needed more conversation options, more ways in which they could maybe accompany us on quests outside of the 1-3 character dedicated scripted ones and make them more interact-able. The main villain and lore behind them was not good at all. We could have done with a prologue section of flashbacks from when Geralt was held captive by the Hunt to help piece everything together and make us hate them more.
Endings: Could have been a bit more emotional but they were awesome.
Sound:
10/10
Graphics:
9/10: due to poorly animated trees, poor character models in cut scenes outside of Geralt and the opening/ending scenes
Overall I give it a 9/10 as its side quests, stories and huge amount of content help paper over the overly simplified gameplay in a world which is way too big. I don't agree with this whole put in 10,000 NPCs and only make 100 of them useful. At least in games like Skyrim, you can still talk to quite a few of them. One of the best stories, and the best side quest design' with huge variation and an awesome adventure make this game a classic but I don't think its a 10/10 like people seem to rate it as.
I think BOTW is comfortably above it for example in level of immersion, gameplay, world design, intractability, survival mechanics, etc. In BOTW, I WANT TO explore, I WANT to find things and blow up that random boulder to see whats hidden away. In TW3, I want to follow my mini map or follow my quest directions.