I loved my windows phone 7, it was the best phone OS I’ve ever had.
I liked the UI, I liked the consistency and simplicity of the apps. I had Xbox music before Spotify really took off. The only problem was the trident based browser and Google specifically blocking all their apps and maps from it.
Then Microsoft just dropped support for it… I held out on 7.5 for as long as I could, and then my charge port failed and I upgraded to the HTC One, which was also pretty good.