My biggest pet peeve ever:
I believe in being personable and a part of the community. I think that being a library means that you address your customer (well, I did). However, people don't want to interact. They will note my open hand and slap their books down right next to it, rudely. If i hold out my hand for the card, they will snap it down on the counter like a playing card, and if i ask for it, they slide it forward and inch and say "there it is" like i'm a shithead. I finally started throwing it back at them. One strategy is to say "yes it is" and keep holding out my hand. The other is to take it, finish and then put it down right in front of me. When they ask for their card back, i do it right back at them. they get PISSED and it's totally worth it. I'm probably a bastard, but I will make someone more considerate of the worker, so help me god