"Many people have a fear of flying, or get claustrophobic or motion sick on planes, and windows give them a greater level of comfort in an otherwise stressful environment."

Sometimes after 20 of climbing, turning, and getting jostled by rough air, my inner ear will be screaming at me that we're falling. Being able to see clearly out the window definitely helps, so I choose it when possible. On the other hand you are farther from the central axis so you feel rolling motion a little more, but that's pretty minor.