Most of these don't bother me, but this one irks me to no end:

1. Slow drivers in the fast lane (21.6 percent)

I'm surprised my other ones didn't make the list:

Drivers who change lanes during a turn in a double turning lane. Absolutely hate that.

And......

People who make a left hand turn without using the median (when there is one) should not be allowed to drive anymore!

M