I'm one of the few who started iPhone, went Android, and will never go back. I just personally feel like I can do more with my android. I'm a huge HTC fan. I've dropped this phone off my 3rd story balcony when I had a few too many adult beverages. It landed on the concrete and it only has a few scratches. I love the size of my HTC 3d and I absolutely cannot use my little brothers iPhone 4. Too small for me. Plus i hate the internal battery and have never had any luck with any of my apple products surprisingly.
I will admit that when I got my first android phone a few years ago, it was extremely buggy. However, the operating system has improved leaps and bounds over the past few years.
I would say that you can't go wrong with either the iPhone or a Droid, it all just depends on preference. However, I will say in all caps DO NOT GO BLACKBERRY! They are so outdated, and like JS said, the internet is turrible. Just turrible.