Mine probably don't qualify as "pet peeves" as they're boring, broader annoyances, but:
1) Rudeness and arrogance towards service staff (hospitality, retail, etc) is a pretty quick way to evaporate respect I have for you. Having little to no consideration for the hard work service staff do, treating them like they need to earn your respect, and blaming them for service/business problems they almost assuredly have no say in, says a lot more about you as an individual, your self worth, and your perception of others, than it does about the staffer. I have pretty low tolerance for it.
2) Persistent tardiness. I don't care if people are late, I don't care if they forget, I don't care if life gets in the way. I don't care if they're not precisely on time. Shit happens and I'm not that anal about it, because it happens to me too. But if you're someone consistently, persistently late to literally, literally everything and you never, ever communicate you're running late, you need to develop better awareness of and respect towards your actions and how they impact others. If you're someone who is consistently late, okay, just communicate. Tell me you're running late. Give me a heads up your schedule isn't aligning with mine. Give me information to make a decision. If you're always late to shit, especially shit involving me, and you never communicate until the last minute, I'm going to fucking lose it.
Although, thinking about, my pet peeves probably are:
1) Hammering the pedestrian button at traffic lights. Pressing it over and over and over and over again does not accumulate data in the traffic network and does not make the light go red faster. Press it once and let the system coordinate.
2) Standing or stopping right out the front of gates/entrances or in the middle of walkways. Happens in the supermarket a lot. People walk in through the gates, and decide right then and there is the appropriate time to stop and check their wallets, purposes, or bags or whatever. Step to the side. Allow the flow of people to keep moving.
3) Judgement of children in public. Most of the time kids are just being kids, in that they're irrational, barely controllable little shits. Parents have a hard enough time just parenting, and 99% of the time are doing a fantastic job. You only notice and pick out the worst, most difficult moments, and use that as some weird barometer for their parenting skills. Just shut the fuck up and leave them alone.