1. Lumia 900 was my first smartphone. I enjoyed it and found it to be a fresh alternative to the iPhones and Androids of the day.
2. I upgraded to the Lumia 1020. I'd still be using it today if it weren't for the shaky upgrade path to W10M. The camera can't be beat, and physically the thing is beautiful.
3. I purchased a Lumia 520 as a music player and a Lumia 640 as a W10M testbed, both for ~30 bucks.
4. I got a Lumia 950 right after the price drop, as W10M had improved enough on my 640 to warrant it, and my 1020 battery was starting to lose juice more quickly.
5. I am now awaiting delivery of a Sony XA1. I just got tired of crappy app performance (especially FB and Messenger), the lack of new first-party hardware, the horrendously confusing messaging coming from MS, and I wanted something that stood a chance of matching the 950's camera performance. My fingers are crossed.