I am returning my 7 (and I have owned every single other iPhone since the 3G; with most bought on launch day). Main reason being the lack of the headphone port.
Just not working out for me: because I tether and listen to podcasts all day (and now a bit more difficult to do simultaneosly since the tethering chews through the battery). There have been other times where I wanted to listen to stuff but didn't have the adapter on me. I find bluetooth headphones either fiddly or don't fit me well and like my wired ones.
I realise there are solutions/workarounds such as docks (which adds even more costs) but given that there is no real drawcard for me for in the upgrade to the 7 (as opposed to my 6s) anyway; I will save my $1300 this time. I might have to get used to bluetooth headphones in the meantime and give myself a year; so that I will be ready next release.
If there was something more in the 7 (eg. different form factor even); I might have hung on just to get something differerent.
Airpods look nice, but: not available, costs more money, and then they won't fit me anyway (going by the ear pods; which I have had to resort to using Ear Hoox with to make them work).
For now I will return the 7 and then re-assess. Each to their own, but that's my personal decision.