MoWell first off since you havent used stock android, and only themes versions its hard to say you like iphone more. With iphone if you try one you try it all.
Working at tmobile you should have access to nexus s4G witch is a great stock pure google android experience.
Unlike Apple witch your stuck with there stock OS/ROM, with Android if you don't like the stock ROM/OS you can completely load up a Custom one made my the huge android community and their developers, that fits you best
Now when you jailbreak your iPhone you can do what? Change icons, tether, use on diff carriers, add sum stuff to lockscreen??? Please tell me more.
Android is able to change: the kernel, revamp UI completely, change the OS to a custom one, font, icons place icons anywhere, use transparent icons, widgets, flash player, hdmi output, remove battery, many different music players, change keyboard, sms apps, and a whole lot more. Way more then jsilbroken iOS.
Here's an example of customization iPhone will never be able to do:
Not trying to be like ha in your face, just pointing out that apple has absolutely lost its sparkle, and is now facing US ban for using a chipset in their products, that is owned by htc, a company apple sued for patent infringement.
There is nothing that apple can do that android cant, and is far behind android. The first iPhone changed the scene for smartphones, but nothing much since then.
I am sorry but as a new starting dev for android, and community member since its release I have learned not to trust mobile reps of testing unreleseunreleased phones. Nothing twords you.