iPhone has become a thing of fashion but they are still just as powerful and more reliable than every phone on the market, whether it be an Android, WinMo, or Symbian device. You are correct that out of the box an Android device is more customizable and if you root it you can customize even more.
I jailbreak all of my iDevices and never had any issues. It's much easier to jailbreak now than it was with the original iPhone as simply updating the device would brick the phone and jailbreaks were often tethered. Now that dev teams have advanced and untethered jailbreaks are almost flawless and allow you to jailbreak with the click of a button its very user friendly for those who aren't as technologically advanced.
There are jailbreak tweaks for virtually anything you can think of. Videocalls on wifi only can be resolved by downloading My3G and MyWi lets you tether your internet for a single payment of $20 (i think) and you can avoid monthly carrier charges for tethering, as long as you keep your data at a moderate amount of usage.
You also make a good point that most buy the iPhone now for texting, calls, the camera, and a few apps. The iPhone (IMO) is the best phone on the market for these simple features. I've had all kinds of phones in my time and for what I use a phone for the iPhone fits me the best. I text a lot and iPhone is great for that. The new iOS pops up my threads immediately, where as android would lag after you get a few thousand texts in there. I also didnt like the predictive text and accuracy of the touchscreen when texting. iPhone seems to be much better in this department.
"(you'll never have a GBA or PSX emulator unless you jailbreak it, thing that voids the warranty)" it may void the warranty but if you were to ever have an issue with the device where you would need to bring it to an apple store or your carrier you could just restore the device and that will take your jailbreak off of the phone. if the phone is dead and won't turn on then there's no way of telling.
All in all it's a matter of personal preference if you ask me. When a consumer makes a decision regarding what phone to purchase they should focus on their primary uses and needs of the device. Hundred plus emails a day = Blackberry, Personal phone for apps and texting = iPhone, Customizable out of the box for those who aren't comfortable with jailbreaking = Android, calls and text only = no need for iphone or droid unless you want to make a "fashion statement".