I’m an iPhone guy and was thinking of switching. I was looking at the s7 and s8 as well IF I decide to switch I’d pick an s7, here why.

Charger. The s7 uses the micro usb which I have hundreds of. The s8 uses the usbC which I have none of.
I don’t like home buttonless phones, the s7 has one.
Always buy a generation behind, let someone else work out the bugs.