Honestly, you're lucky. We've had nothing but problems with the trackballs at work. To be clear, I still love the software part of the UI, I just hate the trackball.
Did you ever use any of the old style blackberries?
I'm not saying the problem isn't there, just it might be exacerbated by user behaviour that RIM didn't anticipate.
I haven't used any of the old models, but now I see that I've been missing out :) My next phone will most likely be the Torch (or it's successor) as I think it combines best of both worlds.
I'll echo what everyone else here is saying - Blackberry is still king with email and might always be. But the iPhone and Android are just doing something completely different that's more relevant to more smartphone users.