I've always used the bumper view, as it's truly the most realistic FOV experienced in real life cockpit.
It's beyond me how all you guys using the cockpit cam aren't annoyed with:
a. the SEVERELY restricted vision of the ground in front removing the the true sense of where the car is on the road.
b. the totally ridicules A-pillars, which don't APPEAR that bulky in reality as your eyes are focusing outward into the distance which eliminates everything inside, unless you're glancing down (which is different because the human eye can focus almost instantly, then refocuses outward again)
c. the annoyingly delayed motion of the drivers arms and wheel, as well as the predetermined shifting motion
d. the rear view mirror isn't as clear as the independent mirror in bumper cam mode