I've got a 16GB iPhone 6; 14 apps (size range is 6MB to 486MB: Pages being the largest, Fing being the smallest), no games and about 1.5GB of music, 54 photos (just got the 6 about 3 weeks ago) I have 7.2GB left. It adds up but my photos are backed up automatically to my NAS drive as soon as I enter my home WiFi range. I'm not worried about space.
* To add, I use Safari for Facebook (the app and data is massive, 400+MB so that is half a GB saved right there) and any other apps that has an old fashioned website ;-)