I had a blackberry, it was really good, but since I had an outdated model, the scrolling part stopped working at one point and then I had to get rid of it. Luckily, the newer blackberrys have a touch scroll thing which would prevent that problem.
Iphones in my opinion are to fragile to own unless you are extremely wealthy.
My mom has a galaxy and loves it.
If your a teenager, I would go with the blackberry, and if your older I would go with the galaxy because the galaxy is really big.