I really enjoy City Living, it adds a little bit of everything, a new world, new careers, new community lots, a new skill, a bunch of lot traits and challenges, a ton of great and versatile gameplay objects, I love the build buy, CAS has some really unique and interesting assets, I enjoy the apartments for what they are, I enjoy how dynamic the city is and that it's always changing with festivals, NPCs and vendors coming and going.
It's simply an incredibly versatile pack, I'm not necessarily dedicating my game to playing specifically with the pack, but I always find myself using the content here and there for whatever reason.