Of course, it's personal preference. However, it's sometime easier to set some criteria that are more important to you to help you decide. The black bezel has the advantage of disappearing when the iPad/iPhone is asleep, while with the white it's always there surrounding the functioning screen area. The black bezel also disappears when you're watching movies, allowing you to focus on the movie frame. The white bezel can more easily show lint and stuff on it, which as an OCD-ish person I find I'm constantly swiping at, which can be annoying when you accidentally swipe onto the touch space and change something you didn't mean to. I've tried both, and decided on the black bezel for my iPhone and white bezel for my iPad Air.