Me too as a Ex Android user that jump ship to WindowsPhone Lumia720. Enjoying my phone so far. One thing like all of you had said is lack of apps.
One more thing that not many people are affected is able to streaming media from my PC. Android had that function long time ago but till this very day WP still couldn't do it. Or if anyone know can pin point me to the right direction?
Aside of this two its a perfect phone for me. Spending more less time wandering aimlessly in the store. Only apps I used nowadays are WhatsApp wechat facebook and lyn. Can focus more in a way ^^