I've had a Droid X for two and a half years and it's 8 gb. Therefore, when I pre-ordered my iPhone 5 I decided to go with the 32 gb version. I probably could've gotten by with the 16 gb but I'd much rather have too much than too little.
I had the 64GB last time and did so again this time. My iPad 3 keeps the larger games on it and my iP5 will be smaller games for time filler and other storage needs.
there are backup storage for cheap these day..why spend the extra $100 or $200 for additional 48GB of stuff that you never gonna be use? Hence that 100-200 can get you 1TB+ of space externally or you can upload to FB or many other ONLINE photo sharing.