Why I chose WP8:
- Its Unique UI
- Tired of iOS UI and iOS limitations(like: music downloading and syncing and ...)
and Why Leave WP8.1 and Give iOS 8 another chance:
- WP lag
- WP frustrating Resuming
- WP app gap
- WP app last updated gap (look at Line, Viber, Instagram, facebook apps and its deference on WP and iOS and Android)
- WP leaves First Priorities and focuses on Second
Personally I just don't have these iTunes problems. I have it installed to put movies onto my iPad which I watch with the amazing VLC app. This works without issues per drag and drop on Windows. I listen to music using Spotify (which is much better than on WP). Contacts, calendar, email, that's all perfectly synchronized from my Exchange account, and the built in calendar is a pleasure to use, supporting my multiple Exchange calendars perfectly. The OneDrive app works nicely on iOS too, including auto-picture upload from the camera.
Those are probably the reason why I feel so comfortable with my iPad. Of course the great app ecosystem also helps. And the better VPN support.
And this would most likely be the same on an iPhone.
I'm not frustrated with WP, it's okay and I like it very much. I'm more frustrated with the low-end focused hardware, all the limited releases and phones that are announced months in advance, feeling outdated when they finally hit the stores.