I've used an iPhone, Android phones, and a Windows Phone 8 all as daily drivers, and the phone I have now is... a BlackBerry Z10!
By far my favorite mobile device that I've ever owned. Sure it's a few years old at this point, however there's really no other device I'd want to switch to. This one's got the perfect physical form, and BlackBerry OS 10 is by far my favorite mobile operating system.