Simple...the majority of Blackberrys are used for work, while the rest of the smartphones are used for fun.

Personally, I've seen a lot of the popular apps for the iPhones and Androids, and really don't think I'd ever bother with any of them. I only use my BB for calls, emails, texts, some on-the-go social media, and occasionally as a GPS. I don't even use BBM.

It all comes down to preference and going with the product that matches your needs.