Two wildly different things:
People cracking their knuckles. It's like fingernails on a blackboard to me. I will literally stop mid-sentence and ask someone to please stop doing it, it makes me that crazy.
Passive-aggressives that drive at or below the speed limit in the left lane for miles on end because "they pay for both lanes", when they are really trying to make the point that they are not going to let anyone go faster than them because they are apparently the guardians of the road (and/or speed limit). People - you are not cops, you are not my mother - the left lane is for freaking passing, not parking.
/rant
People cracking their knuckles. It's like fingernails on a blackboard to me. I will literally stop mid-sentence and ask someone to please stop doing it, it makes me that crazy.
Passive-aggressives that drive at or below the speed limit in the left lane for miles on end because "they pay for both lanes", when they are really trying to make the point that they are not going to let anyone go faster than them because they are apparently the guardians of the road (and/or speed limit). People - you are not cops, you are not my mother - the left lane is for freaking passing, not parking.
/rant