Honest question, what do you use the space for? I used to use mine for music, but now I use Pandora and Spotify.
It is pretty silly but also annoying as the iPhone has a strong following due to its "it just works" design. Girls in particular love it for the camera but 16gb just isn't enough space to get my SO and her friends past a few months of photo-frenzy.
The 128GB internal option is the one which'd make me actually consider an iphone 6.
Not starting with 32 gigs seems like a bean counter somewhere trying to be clever and force more people to opt for the higher storage (read: more expensive) versions. Might just be my tinfoil hat talking.
Personally, I want a MicroSD slot because that way we both win.