I never finished DoS2, was it a massive branching epic story? Or was the gameplay/companions/coop more the focus?
It's massive: took me 256 hours on my only run to finish (I'm non-tedious completionist). It's branching: you definitely allowed to solve quests differently, there are several endings. Gameplay has also a huge focus (the combat actually has a real AI, it's not stupid), companions were fun too but you have to permanently choose them after chapter 1. I haven't played coop, so I don't know how fun it is. DOS2 has all the aspects done pretty well, which is why it was so popular.