Welcome back to iOS. One only starts to appreciate something when (a) it's gone, and/or (b) been away from it too long and misses it.
I've switched from a BlackBerry Bold 9000 (it was a great phone, loved it!) to an iPhone 3GS 32GB back in late 2009, then to an iPhone 4S 64GB in 2011, then an iPhone 6 64GB in 2014 and now to an iPhone 6S Plus 128GB about a month and a half ago and it's fantastic. The screen size is excellent, build-quality far far surpasses that of the iPhone 6, 3D Touch is more fun and useful than I had originally thought, and the battery life I've been getting 60–73hrs standby time and over 9hrs of actual usage time on a SINGLE-CHARGE meaning I charge it every 3rd day. It's marvellous!