BlackBerry Android.
I have just got a Q5 and it's a great phone (mostly, there are a few places it lacks polish, such as the email editor, it's vile, a step back from the OS 5 version which was usable). Much better overall than the old clunky OS 5 and 6 phones I had previously.
I still see BlackBerrys everywhere, if they can retain those users when they buy their phones, they should be OK.
I think an Android app compatible phone, which is not directly subject to American surveillance, should have a good future. (All other current smart phone systems are from American companies, which are subject to American law and hence to having to comply with the NSA).
However BlackBerry have made a few stupid mistakes.
Promising BB10 on the playbook and then dropping it. (If I hadn't got an insurance payout on my 9700, that would have been enough to stop me getting a new BB)
Making BB10 incompatible with the older server systems, and not making BB10/BB7 dual boot devices available.
Taking so long to get BB10 out of the door.
And I think they were a bit slow getting BBM working on other platforms, and since the multi-platform release, there have been serious issues trying to add contacts.