My first smartphone was a Lumia 800, and my second was a Lumia 920. I really wish the third could have been a 950 XL, but... I couldn't make that jump.
I love Live Tiles as a design concept - it's really what brought me to Windows Phone in the first place. WP8.1 was a truly exquisite piece of design and usability.
However... there's just so much uncertainty surrounding the platform. I buy my phones upfront and unlocked, and I try to keep my devices for as long as I can. Maybe UWP will turn out to be something great, but right now... it's not there. I need something for the now, and much as I find the Android UI lacking, it's really the only way I can be sure of getting a reasonably well-supported platform for the next 2-3 years. Windows 10 Mobile right now is simply too much of a work in progress for me to bet on.
On the hardware side, I also loved the Nokia DNA. The 920 still feels special in a way that other devices of its era simply don't today. But that DNA is unfortunately dead, and with it went that special flavor that the Lumias had, vibrant colors and all. It's a pity.
I wish Microsoft well, and I'll keep using their online services on my HTC 10. (I do wish Cortana was available in my country, though.) Maybe I can return to whatever the Microsoft mobile platform is a few years from now, but until then... it'll be Android and HTC for me.