I love them, I only like entirely open world games or entirely linear games, nothing in between really, because then I just feel like I am missing out on stuff...
But anyway, I have loved Assassin's Creed, Red Dead and inFamous because the worlds are interesting and you have interesting tools to play with and the sand box lets you have more fun. I would say inFamous is the least sand boxy game out of the 3, where I felt I spend most of my time just directly doing the missions, whereas in Red Dead, I spent ages just messing around hunting animals
In Brotherhood, I have spent 14 hours playing so far and while I have finished the story, I still just enjoy running around the rooftops and randomly killing guards (or better getting my Assassin babies to kill them {don't ask why they are my babies...}) because the world is interesting to explore and Ezio's abilities are fun to play with
