I love anno 2070, and spend so much time on it, the only thing i dont like is at later stage of the game, space is an issue and you will need to start placing building so tight to each other in order to achieve certain amount of population, they have a target like 5000 top class of population and that normally will need you to spend every single tile carefully. Oh and the battle system isnt very good either, very difficult to wipe an AI outta the map completely.