I don't understand why people need validation in their phone purchasing decisions. If you like your 3D or Photon, then enjoy it. They are both great phones & both have their issues. I have a 3D and love it. I also acknowledge its problems. I recommended the Photon too my girlfriend, since we didn't want the same phone. The Photon is cool too, but has issues also.
If Sprint had access to the I-Phone I can't say with certainty the i wouldn't want to give it a try, unlikely, but who knows. I'm a fan of new technology, not brand.
Why the need to be a fanboy?
Unless you own stock in either... Who cares?