People who don't say thank you. It's free, not that much work and completely painless.
Mini rant; So I'm on another forum and there's quite a few local guys. One in particular, J, is a younger guy and I've helped him out a few times with his car. Mainly letting him use some of my tools/equipment. Last time it struck me that I didn't get a thank you. Maybe it's a small thing to fixate on but it kinda bugged me.
So fast-forward a few months and I'm on the board and there's a situation where a project car was purchased from member R, who's local, by K who lives about 250 miles away. K won't be able to come get the car for a few weeks. Seller, R, has moved and lost his storage so the car needs a temporary home. I PMd K that I had a tow dolly that I'd loan for the cause if he could get someone with a truck to tow it. Member A offers to tow it. Perfect! Out of the blue I get a text from J asking if he can use my dolly to get his car to the body shop. I let him know that it'd be okay but I don't normally loan it out. He shows up at my house with a borrowed truck but the truck's 7 pin doesn't match my dolly's 4 pin wiring. He decides plan B would be to borrow his mom's van. I tell him to just put it back where he found it when he's all done and I go back in the house. 3 hours later I get another text to the effect that since my wiring didn't match his cars I had really inconvenienced him and he just went and rented a trailer. WTF? I looked out my window and the dolly is still in my driveway. The wiring is all ****ed up and it's not put away behind my shop where I store it. And...there was no "thank you". I think I'm done helping J.
Now I get to go fix some wiring so we can get K's car moved. I think I'm remembering why I don't loan my stuff out.
