I would like to hear your thoughts on why you have both OSes or transferred to the other side. I have both because of awesome qwerty blackberry keyboard and modern WP design and great communication features in the WP. Two of the best in the world.
I bought a WP because its the best OS ever, and I bought a BB Z10 because I thought they were going out of business and no store near me ever stocked them, so I never tried one. For $150, not a bad deal since it's in mint condition.
I am a solid WP user, but if I thought BB10 had a chance I might leap. Love BB10. I think it is an OS ahead of it's time. The gestures and motions are fun.
I do miss the QWERTY keyboards of BB. Haven't played with the Q10, but I see no reason to think it wouldn't rock the house.
I had a 9000 and a 9700, as you can see in my signature. However, I switched to Windows Phone since I was tired of waiting for BB10 and tired of the lack of apps. At this point, I doubt if I'd ever consider another BlackBerry device.