16 or 32GB?
I made the mistake of getting a 16GB 4S but I feel like it's mostly photo/video/music that I have on there...
I thought 16GB was enough... until I was getting low on space trying to install Asphalt 7 2 weeks after owning it. I switched it for a 32GB and I'm happy with it so far. Some games (racing especially!) get pretty big, I had zero music on my iPad Mini and I was surprised to run out of space as fast as I did.