No thanks! I don't want carriers to have any kind of control over the phone I opt to purchase. I got burnt last time I bought an Android phone with all kinds of bloatware that I had to root just to get off the phone. Hence why I got an iPhone (I was so tempted to get the Lumia 900 but that's besides the point), I hate bloatware. I should have an option to remove it through normal means that doesn't require me to void my warranty on the phone and deal with custom (and sometimes extremely buggy) ROM's.
Another reason I wouldn't want the carrier having any control over my phone is because I don't like the fact that with the Android platform not all phones get the latest updates, leaving people who're stuck on a 2+ year contract with an older phone out. Hence why closed (Walled gardens) platforms to me are superior to Android when it comes to getting the latest updates from the OS/Hardware manufacturer.
Not saying that Android is a bad platform in any way, because I did enjoy my Evo 3D (and the many ROM's I got to play around with), it's just that when it came to getting the latest software I had two options which were wait for HTC to roll out the update then wait for Sprint to send out the update, or void my warranty and root the phone just so I could install a custom ROM, which I shouldn't have to do).