A blockhead's head doesn't actually move, only it's limbs do. Camera bobbing would look weird like that.
Same for minecraft. Looks just fine.
Besides, Z key.
Imo what we need is the ability to use the Z key in first person.
Maybe, like a toggle. So when its on, you will move your head to the side until you can't rotate it anymore, at which point you will move your body. And if you're moving whilst doing this, your body will correct itself and you will move in the direction that you're looking
Aka like minecraft does.
That'd make things like rp's much more realistic.