Black 32 GB AT&T model. I had a 16 GB iPhone 4 for two years. I loved the phone but I didn't like not being able to put all my music on there. So, I sprang for a 32 GB this time. I wanted a 64 but I couldn't justify another $100.00 for extra space.
I originally ordered a 16G white one, but then I found out that the local Verizon store had one 32G left in stock, also in white, so of course I ran there and grabbed it!