Here in north America, people just don't run yellow headlights. They're probably illegal in the US. So as HB Chris wrote, if someone behind you in running them, they're obnoxious. If a police officer catches you with them, you might get a ticket.
I have yellow high beams and driving lights, they are easier on the driver's eyes than white ones imo, providing a nicely lit area in front. I always dim them for oncoming traffic. Normal low beams. I think yellow low beams are illegal in most states, yellow high beams and driving lights are legal where I am.