In terms of the OS here are what I liked and disliked:
Dislike:
1.Volume setting is unified. I would prefer that each have their own volume level settings. There are times that I want email and message tones to be at their loudest and the phone Ringer on mute. I hope that on future OS updates...
new WP 8 user here.
long time blackberry user, Had iPhone and android on the side but kept on going back to a blackberry. This time wanting to try something different and it seems WP fits the bill