I too have a Blackberry(Passport) for three years now, and if it breaks I'm planning on getting another one. The reason is simple: The OS is amazing and still ahead of all competitors in aspects that are important to me, it does everything I need well enough and I love the device's and screen's dimensions.

Honestly it made me lose all interest in any other phone.

Me too. I've had mine for ~4 years and it's going strong. Blackberry OS 10 is really nice, and I prefer it to Android and IOS. They seemed to 'get' what a mobile OS should be (i.e. a helper not something that takes over your life). Then again, it is frozen in time 4 years ago.

In the past I have had to install a root CA (for AWS or LE, I forget which), I have to use FTP to get my pictures off, but the trade-off is worth it in my book.

I always get an amazing amount of push-back (from astonishment to outright "you're wrong") from people who argue that no-one should ever want anything except what Apple and Google want to push. Well, some people do!