Finding the poll results rather interesting.
Find the numbers claiming the headphone jack was a deal-breaker frankly unbelievable. I suspect many of these people were swayed by other factors too.
Also surpised there's so little love for the Gold & Rose Gold options. I thought Gold was quite popular but obviously not. My current 5S is gold and I quite like it.
People jumping on the bandwagon I suspect. Even if you have invested in wired headphones that you're precious about, attach the dongle to them and the problem goes away...
I personally use the jack a fair bit, but that's only because the supplied headphones used it. I also have some MPOW BT headphones for when I'm running and they're honestly fine - so I don't think I'll miss it one bit.
I think gold and rose gold are still very popular out in the wild. On a computing forum, predominantly male, and of which space grey would have been the default choice - people will opt for the new colour on a new product.
I've personally gone for a 128Gb plus in Gold.