There are very few traffic circles AKA roundabouts in California. There were some in NJ and NY, where I learned to drive, but most are gone now.
DH, born and raised in CA, can't maneuver them without my coaching him through, and oftentimes we go round and round a few times before he can exit.

When I was 18 and in a traffic circle, a lady clipped my driver's side. Got out of her car and started wailing that her boyfriend was going to be so upset that she had an accident in his new car.
I couldn't believe my ears. I said, "You ran into ME!" She looked at me very dismissively and said, "You were in the lane I needed to be in."
A nearby cop saw the incident and stopped to help sort it out. He shrugged and said, "Traffic circles are nightmares. So many accidents." That was it. He sent us both on our way and she didn't have to pay for the damage to my car.
I hated traffic circles before that and even more since.