I'm a big Windows fans and I use Windows Phone (WP) as my daily driver. I don't have any problems with it at all, but I'm moving to Japan. WP doesn't have a presence in Japan and I'm not willing to get a mid-ranged/low-range phone when I use my devices so much.
So, I'm posting this in iMore as well as here to get information on which OS I should switch to and why.
Here are the OS related things I use all the time:
Navigation apps (Here maps on WP)
Cortana-esque services for time and location based reminders and voice recognition for messaging.
Hardware requirements (if you know about Japanese phones - I'm getting a device from NTT Docomo, probably - I'm also open to better alternatives to things):
Glance screen (I don't know if android has an equivalent)
Double tap to wake (or a fingerprint reader for fast access to the device)
Physical camera button (preferred not required)
Capacitive or hardware buttons
Good camera hardware.
4.5 inch screen (negotiable, but I don't want a phablet)