Definitely the best for having believable, dense and bustling cities. While the scenery and nature in most open world games is great, a lot struggle with the cities not being super small and also boring. Where as in the Witcher 3, there is whole story arcs solely in Novigrad and it feels like a place that people would live in.

Witcher 3 is a fun game and an acclaimed one at that, so the following is just my personal experience. Not taking away anything from it... but playing a superhuman hunk constantly bumping into sexy young witches thirsty for you felt to me very, very cheesy.

Witcher 3 is a really solid choice.