7. I love the interface and I think WP has amazing potential. There's a lot of small problems that I think are holding it back though. I see many people complaining about no orientation lock, separate system/media volume controls, etc. Nothing you guys haven't seen before. A biggie for me is the Facebook chat integration with the messaging hub. It only briefly worked for me today, but ever since I had my HTC Trophy and even on my Lumia 928, it hasn't worked right. I tried disabling secure browsing and that worked for a while until I logged into touch.facebook.com from IE on my phone. Then the messages stopped working again. I see people having a lot of trouble with this too.
I love the idea of it being integrated like that, but it needs to be fixed and it should have the normal capabilities of Facebook chat (like sending pictures).
All these tiny problems add up to a big one. Windows Phone does many things right and does very few things wrong, but there's usually some odd feature missing or a weird bug with everything it does right or tries to.