What stereotype bugs you the most?

First of all, let me tell you that I think this is one of the best questions I've seen on this site. Now, I'll say it all depends on the way the stereotype is presented. For instance, if it's presented in a humorous way, I don't mind them. I was watching a movie the other day, and at one point, two characters are engaged into a conversation about laziness, and one of them says "Once I was in Argentina, nobody seemed to want to do anything there". I'm paraphrasing here, but even as an Argentine, I found that line hilarious. Why?, well, because the context made it funny. That's a whole lot different than stereotyping out of ignorance. My personal favorite, is people going into imdb.com or similar places, and ask about a certain actor heritage. Lets use Cameron Diaz as an example, the question in her page would be something like: "Her last name is Diaz, which is latino, but she's blonde and has fair skin. Was she adopted or something?" I'm not kidding, I've actually seen a post that asked that question. But to be honest, I wouldn't say they make me angry. Sad? Maybe a little, it's sad to see people being so ignorant. But I choose to laugh about it, I don't win anything by getting angry at them. Rich