I have a Galaxy S6 and a Note 3. When the iPhone 6S+ (or 7 or whatever it's going to be called) comes out, if it has a seriously mega camera, I may jump ship. It's just whether I will be able to go back to the Apple environment from Android. A lot of the reasons I left there iPhone are now moot - can't drag and drop videos and music onto it was a big one for me, but with the advent of Netflix and Google Play Music/Spotify that really isn't a big deal any more. Don't get me wrong - I LOVE the S6, it is absolutely brilliant. Especially now 5.1.1 seems to have fixed up a lot of the memory problems (not completely sadly - Relay Pro still loses where I am when I switch in and out, which is really irritating), but I am obsessed with getting the best camera possible. It will take a lot for the new iPhone to beat the S6 though, the double press to open it is so fast, and the quality of pictures is stunning. I love taking photos, so a seriously amazing camera on a phone is pretty much top of the list for me (please nobody say 'Nokia 1520'... too slow and old now!), but I am not in any way prejudiced against a phone just because it has a Hipster image. That's just cutting your nose off to spite your face, isn't it?
The new Note 5 isn't coming to the UK officially, which sucks. Not that I would have got one (although, if it had been released with the S6 I definitely WOULD have got one). Non-swappable battery is a bit of a pain, but I carry around a fast-charge Xiaomi 10,000 mAh battery now instead of a spare battery.
Yes, it is a little bit of a pain, but not that much as I take a bag everywhere anyway and it sits in a pocket. The SD card thing I really don't care about at all; I have always seen them as a big pain. Not being able to install apps in them (yes, I know you can sort of on some phones, but it is a poor solution at best) and having your phone split into two drives is just irritating. My S6 is 64gb and it's SO much better than my S5 with a 64gb card in it, which I STILL had to be constantly file managing - once you install a couple of big games, all the space in it's little 16gb memory is just sucked out of it.
I can't wait to see the iPhone though.