My objective reasons for preferring the black bezel over the white:
- The screen is black much of the time, including when the iPad is turned off -- so it blends pretty seamlessly into the black bezel. With a white bezel, there is a sharp contrast.
- Black bezel + black camera aperture = camera is pretty much invisible. With the white bezel, there's a small black dot where the camera's located.
- I have no basis to know if the white bezel is going to yellow over time, but I've seen other white things in the past yellow over time. Black doesn't turn grey.
- When watching movies, the white bezel would be enormously distracting.