The 3ish hour run of INSIDE is hard to top for me. It's just an incredibly polished experience from start to finish; I find it hard to find a single flaw in it.
Not a fault of God of War or anything. That game is fantastic but it ended up losing steam with me at points and I was just going through the motions to see how the narrative would play out.
Came to post this. This game will look and feel just as flawless 20 years later. It's absolutely perfect. I have it one every platform it's available. God of War definitely was my favorite AAA game of the gen up until TLoUII which like the OP said isn't perfect either. Both games definitely trade blows with each other.