I like being a librarian. Mostly, I think it's something I'm good at. But there are two things that happen all the time that drive me nuts. Our library doesn't have wireless on every floor right now. It's only available on the top two floors and we have signs everywhere about this. But it never fails that someone will come in, sit at a table for awhile and then come up to me and complain that their laptop won't connect to our wireless on this floor -- which is not one of the top two floors. I've gotten very good at saying patiently, "I'm sorry. Wireless access is not available on the bottom floors of the library yet, although we are working on it. If you go to the top two floors, you can use the wireless. Let me know if you still have a problem." No one ever comes back to say that they can't use wireless Internet on the top two floors. What I want to say, even though I know they don't read the signs, is, "See the signs? What do they say? What floor are you on?"
The other question that drives me crazy is, "Do you have such-and-such a book?" And it's not so much that question, it's the follow up I dread if we don't have the book. It's always along the lines of repeating the question (sometimes endlessly), or saying something like, "Did you look it up by author as well as title? What about keyword?" As if repeating it would somehow make the book magically appear in the library. I'd be happy to get it on interlibrary loan for them if it weren't either their textbook or a book they need that day, but it's inevitably one of those two.