When people you just meet are really candid with you. Yeah, within 15 minutes of working with you, I now know you were raped when you were 13. That's the sort of thing you want to save for the 5th or 6th time we share more than 10 words. Not the third.
Work drama. It's really not hard to keep things civil at work and I don't understand why people choose to complicate it. After all, the job is the reason you're there and is the most important thing, not the "friends" you may or may not make among your coworkers. We don't have to agree on everything and we don't even have to like each other. The only thing required of you is to keep shit professional while we're doing our fucking job.
Gossip at work. Please, don't fucking come to me with that bullshit. I do not care that Tanya is dating the guy in seafood(who is old enough to be her father or whatever) and i dont care that she broke up with the guy in general merchandise to get with him. This has literally NO effect on the position I signed up for and you're wasting my time by telling me.
Coworkers who complain about their job. Mostly because i actually, genuinely love my job, but also because i think theres something unprofessional about openly complaining while working around customers. I got in trouble at my last job several years ago for being too loose-lipped and complaining. Always asking to go home early, constantly muttering about the intense manual labor, and even talking to customers about how unfairly my boss treated me. After a while of that, the management got the odd idea that I didn't want to be there. So, I've gotten to the point where if there's a paycheck involved, I've got nothing but good things to say about the company to ANYBODY who asks. I make it a priority to increase the numbers on that check. And I feel annoyed with other people who whine as if they aren't getting paid for every moment they stand around whining.