Just thought of another one....
People who drive cars with lights out...that's my biggest one. I can't stand it. Whether it's a headlight, taillight, brake light, signal, whatever, it drives me crazy to drive behind them. I always see 2nd-gen Jeep Grand Cherokees with the 3rd brake light out. It's illegal, for goodness sakes, get it fixed!!!!!
I do a light check on both my cars each month. I get them fixed ASAP.
Also add to the list who drive in rain/snow/ bad conditions with out their headlights on, or just their DRLs. (Toyota drivers, are you listening??). That's also illegal where I live.
OK, it's all out now....