MikeB4:chiefie: Actually thinking more and more so... with iOS 9 App Thinning, and the reduced monthly subscription of iCloud Storage plans, I think 16GB would be sufficient - I've been using 16GB iPhone 5, and with 20GB iCloud Storage for Photos and Backups etc... I've taken the hard and fast discipline on keeping what really matter to me with me and not every little things. So I think it is possible to get along just fine with 16GB.
I have a 64GB 6 Plus and have only used a fraction of the storage. I have photos set to go to One Drive (1TB) and I delete them off my phone on a regular basis. I also think 16GB is probably enough.
not enough when you're on a 1 week holiday in the middle of nowhere :) ....