Same, and even when I don't, it tends to feel a bit "cramped" for me. I know it's supposedly more realistic, but my eyes see far more of the world and what's going on around me than what's going on in first person games. It's more similar to removing the bottom of a cardboard box, holding it up in front of your face and then viewing the world through that.
I'm not sure if that made any sense, but the point is that an eye is formed like ) instead of |, which means our angle is far greater than just what's straight ahead of us. For example, I can almost always see my body, including my hands, even without holding them up in front of my face.
Exactly. There's no peripheral vision in 1st person view, so with the over-the shoulder perspective I at least have some idea what my companions are doing without having to repeatedly whip the camera around during combat.