It doesn't bother me as much as it used to, but the left lane huggers (either by regulating or by ignorance to their environment) are annoying none-the-less. What annoys me more is when I do eventually pass them which I have to do on the right, they get mad at me?!? Pacers are far worse because you can't get around them ever.

I think my latest pet peave is those people that drive in moderate to heavy traffic and don't stay close to the car in front of them. If you leave a gap large enough for a car to fit, then you should assume a car will take that place, meaning your lane moves slower on average than the lane that car just left.