I've often questioned myself about where I'd be today without an iPhone.
My first phone was the one with an antenna, I was a senior. Then I upgraded to a Motorola (I believe) juke box phone which looked like the NGage. Then I upgraded to the Razr, and then Samsung Blackjack. I returned from my 15 month deployment and wanted a Black Berry but then learned about the iPhone 3GS that just released a few months before I came home and that is the phone I got myself and my wife. We've then upgraded to the 4, 4S (just myself), and then 5 (my wife).
I used my brothers Android phone last year while he was in ICU and I was on emergency leave, I used it for a month and I did like some features of it such as Widgets, but didn't like the App Store very much and how fast it died.
One of my coworkers uses a Black Berry phone and I asked him why he doesn't get an iPhone and he said he's happy with just texting, I don't get it since he pays the same monthly amount I do. But to each their own. I wouldn't mind switching but I already know I'd hate it.